As the title says, what are some of the most surreal scenes you have ever seen, be it movies, television, or anything else?

I got inspired into making this thread having just watched Dumbo for the first time in a while. I'd forgotten just how truly insane the "Pink Elephants On Parade" number is. I mean, forget that it's a result of a drunken hallucination--that's not crazy enough, particularly for Disney. All the different elephants changing size, shape, color, form, all dancing to a catchy but creepy song that escalates into pure insanity by the end. Gah...I can't really do it justice.