The classic movie The Wizard of Oz was based on the book written by L. Frank Baum, The Wonderful Wizard of Oz. Baum, a noted member of the Theosophical society, who rejected Christianity and converted to Gnosticism two years before writing the book. He included many Gnostic elements in the book. There are so many overtones. The light of the NDE is past the tunnel (represented by the tornado vortex), over the rainbow (all the colors seen in the tunnel) and in the emerald city (crystal city is seen in some NDEs). One could even make an argument that Dorothy had an NDE as a result of the tornado. The characters and attributes of the Tin Man/Heart, Lion/Courage, Scarecrow/Brain etc. represent the redemption of those lacking in some essential quality, ultimately being restored and causing their life to be almost reborn. The Wizard, the frail old man behind the curtain running the show, is the Demiurge, seemingly all fierce but really nothing in essence: "pay no attention to that man behind the curtain."

The Scarecrow needed a brain to acquire knowledge/Gnosis. The Cowardly Lion needed courage to overcome fear. The Tin Man had to learn to love/heart. Dorothy representing the Consciousness being immersed, had to kill the evil witch, her Ego/Counterfeit Spirit, to progress. The Good Witch was the Enlightened Afterthought propelling us onward.

Dorothy lives on a farm (just like we do) talks about someplace where there isn't any trouble...says it's far far away "behind the moon", beyond the rain..."somewhere over the rainbow". She is looking for Auntie Em (Emily) in the "storm" which becomes the vortex..... EM....E-M.....ElectroMagnetic? storm.
When she crosses over the rainbow into munchkinland (DMT elves or archons?), they say she fell from a star (Lucifer/Sophia/Sirius?) and they make a big deal about saying the witch is "dead"..... Before they get to the Emerald City the wicked witch has used poppies to drug them and put a spell on them. No one has seen the great Oz.... he projects himself as a green headed alien.

I like the analogy of Dorothy going through the vortex tunnel, over the rainbow of color, and into the dreamworld (astral) and the demiurge wizard using tricks and deception to run the crystal city of light...very similar to NDES.... the lyrics even say to "step into the light" before they enter the emerald city.

And then Dorothy repeating a mantra ("there's no place like home")/uses focused intention to wake up from the dream and return back home. The ruby slippers represent the "inner spark" within all of us. When Glinda instructs Dorothy never to take off the ruby slippers, she is telling Dorothy never to lose her inner spark.

"Look! Emerald City is closer and prettier than ever! Oh, we're almost there at last! At last! It's beautiful, isn't it? Just like I knew it would be! He really must be a wonderful Wizard to live in a city like that!" Notice the Wicked Witch's compass or armillary sphere.

"You're out of the woods, You're out of the dark, You're out of the night.
Step into the sun, Step into the light.
Keep straight ahead for the most glorious place
On the Face of the Earth or the sky.
Hold onto your breath, Hold onto your heart, Hold onto your hope.
March up to the gate and bid it open"

That's what they sing right as they get to the emerald city.

Glinda the Good witch tells Dorothy, "You don’t need to be helped any longer. You've always had the power". This is the key component of Gnosticism, that the soul or spirit is a divine spark and we have the Light Power within.

The Wizard of Oz essentally contains the formula for how to escape this matrix and return home: Dorothy, clicking her heels, and repeating over and over again like a mantra "There's no place like home." In order to return home we definitely do need to maintain an Intention, will power and continual focus on raising our frequency, almost like repeating a mantra in our mind. Dorothy wakes up in bed in her room mat home realizing it was all just a dream.

I compared the movie to the book, The Wonderful Wizard of Oz. [Notice the usage of the word "wonderful" which means "full of wonder". This is similar to the usage in Alice's adventures in Wonderland.] There were some differences between the book and the movie.
In the book: The slippers are silver, not ruby red. There is no rainbow. Oz can take any form he wishes and he appears to Dorothy and her friends individually as an enormous head, a lovely lady, a terrible monster, and a ball of fire. Finally, when they all approach together he is invisible, just a voice. Instead of Toto pulling a curtain away, there is a screen which falls down. The Good Witch, Glinda, tells Dorothy to command the shoes to take her home instead of thinking 'There's no place like home'. Also, Dorothy was not dreaming it all like in the movie.

Check out these passages from the book, however, and compare them to the reports of the being of light in near death experiences who sits on the throne and is rarely seen to face to face, and seemingly always has a mission for the soul to do first before allowing access. Also, to the DMT reports which speak of a white room with a large dome and a light at the apex :

"Why, it is said that he never lets anyone come into his presence. I have been to the Emerald City many times, and it is a beautiful and wonderful place; but I have never been permitted to see the Great Oz, nor do I know of any living person who has seen him." "Does he never go out?" asked the Scarecrow. "Never. He sits day after day in the great Throne Room of his Palace, and even those who wait upon him do not see him face to face."

"What is he like?" asked the girl. "That is hard to tell," said the man thoughtfully. "You see, Oz is a Great Wizard, and can take on any form he wishes. So that some say he looks like a bird; and some say he looks like an elephant; and some say he looks like a cat. To others he appears as a beautiful fairy, or a brownie, or in any other form that pleases him. But who the real Oz is, when he is in his own form, no living person can tell." "That is very strange," said Dorothy, "but we must try, in some way, to see him, or we shall have made our journey for nothing."

"Why do you wish to see the terrible Oz?" asked the man. "I want him to give me some brains," said the Scarecrow eagerly. "Oh, Oz could do that easily enough," declared the man. "He has more brains than he needs." "And I want him to give me a heart," said the Tin Woodman. "That will not trouble him," continued the man, "for Oz has a large collection of hearts, of all sizes and shapes." "And I want him to give me courage," said the Cowardly Lion. "Oz keeps a great pot of courage in his Throne Room," said the man, "which he has covered with a golden plate, to keep it from running over. He will be glad to give you some." "And I want him to send me back to Kansas," said Dorothy. "Where is Kansas?" asked the man, with surprise. "I don't know," replied Dorothy sorrowfully, "but it is my home, and I'm sure it's somewhere."

"Very likely. Well, Oz can do anything; so I suppose he will find Kansas for you. But first you must get to see him, and that will be a hard task; for the Great Wizard does not like to see anyone, and he usually has his own way...

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Just then a bell rang, and the green girl said to Dorothy, "That is the signal. You must go into the Throne Room alone." She opened a little door and Dorothy walked boldly through and found herself in a wonderful place. It was a big, round room with a high arched roof, and the walls and ceiling and floor were covered with large emeralds set closely together. In the center of the roof was a great light, as bright as the sun, which made the emeralds sparkle in a wonderful manner.

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"...You have no right to expect me to send you back to Kansas unless you do something for me in return. In this country everyone must pay for everything he gets. If you wish me to use my magic power to send you home again you must do something for me first. Help me and I will help you."

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The next morning the soldier with the green whiskers led the Lion to the great Throne Room and bade him enter the presence of Oz. The Lion at once passed through the door, and glancing around saw, to his surprise, that before the throne was a Ball of Fire, so fierce and glowing he could scarcely bear to gaze upon it.

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Presently they heard a solemn Voice, that seemed to come from somewhere near the top of the great dome, and it said: "I am Oz, the Great and Terrible. Why do you seek me?" They looked again in every part of the room, and then, seeing no one, Dorothy asked, "Where are you?" "I am everywhere," answered the Voice, "but to the eyes of common mortals I am invisible. I will now seat myself upon my throne, that you may converse with me." Indeed, the Voice seemed just then to come straight from the throne itself;

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"But, I don't understand," said Dorothy, in bewilderment. "How was it that you appeared to me as a great Head?"
"That was one of my tricks," answered Oz. "Step this way, please, and I will tell you all about it."

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"It came down gradually, and I was not hurt a bit. But I found myself in the midst of a strange people, who, seeing me come from the clouds, thought I was a great Wizard. Of course I let them think so, because they were afraid of me, and promised to do anything I wished them to.

"Just to amuse myself, and keep the good people busy, I ordered them to build this City, and my Palace; and they did it all willingly and well. Then I thought, as the country was so green and beautiful, I would call it the Emerald City; and to make the name fit better I put green spectacles on all the people, so that everything they saw was green."