Incredible work!
I'm not personally a fan of the trippy backgrounds but that's personal preference and applies to films and stuff as well, it's not specific to this, and besides I understand that it's key to the piece overall.
The character animation was mind blowing, would I be right in thinking it was drawn with pencil and paper? If so, that's a lot of work and I'm really impressed! :)
Not only that but by the looks of things your understanding of animation and weight / physics in animation is fantastic! Even on the little things like the phone being thrown against the wall - it just looked perfect. Well done! :D