Quote Originally Posted by make it legal
Well thats because the whole movie is a trip and a half. The guy who wrote the book was a huge stoner and loved acid and shit.
Actually, you will find that Charles Dodgeson (Lewis Carroll's real name) was not under the influence of any drug what so ever when he came up with the idea for Alice in Wonderland. There is no evidence he used any drug other than laudanum (which was the standard painkiller at the time, think advil or ibuprofen), and even the evidence for that is sketchy, circumstantial and weak.

http://en.wikipedia.org/wiki/Charles_Dodgson