Inside Valeria Wilson's apartment building is a tiny door that leads inside Keanu Reeve's brain. After about 15 minutes you get ejected onto the side of Route 1. Miss Wilson started charging people to try the experience. Keanu found out, and made Valeria show him. They crawled in together and now are both stuck inside his head, where he believes he is stuck in her head, and he is a former rock star, and she believes she is a future mercenary named "V"
What you are seeing is through the veil at Valeria seeing herself through the eyes of herself as Keanu Reeve's as Johnny.
I know, it's really meta - its all laid neatly in the script of the 7th bill and ted movie, which was lost inside a black hole with Keanu Reeve's who now uses gravity to try warn himself not to let the bus go over 50 mph, or else it will arm a bomb - this information is stored on a Data Chip inside his head that he has to get to London to save his wife, while being chased by Yakuza Vampires! He should be okay tho, he knows kung fu
At least, that's what Gary told me...