The bible speaks of a whirlwind to heaven, John was in "the spirit" but the word spirit is the same for wind. Abraham-Hicks speaks of a vortex of creation. Reverse Speech from all over the world mentions the whirlwind. A myriad of movies depict a tunnel to another dimension, oftentimes it's colorful, like a rainbow. Even in Wizard of Oz, Dorothy travels through a tornado/whirlwind. It goes by many names such as the Rainbow Bridge/Bifrost. If you look up a whirlwind/vortex you will see it's just a tunnel leading to heaven above, which is what many NDEs describe.
I created this in JWildfire and edited it in Photoshop. Besides reminding me of the rainbow bridge to heaven, it also reminds me of an angel wing inviting the soul in.