"May" was intense
"Tommy" based off the Who's rock-opera was sort of like "The Wall," which I also recommend.
"Requiem for a Dream" with Jared Leto
"Eraserhead" kinda old but very strange
"Pi"
"Alice"
"Silent Hill" (Its more-so just creepy)
"The Machinist"

I loved Fear and Loathing in Las Vegas. But requiem for a dream is my favorite!

Someone recommended Pi to me a while ago. But I can't find it anywhere. ><

Really? They have it at Blockbuster...

^Alo is Dutch, or something similar to Dutch, do Block Busters exist over there?

I'm not sure, but as far as video rental goes Blockbuster is about as mainstream as you can get.

Requiem For A Dream is guuurd.

It's not so much trippy though, rather about people who are trippy I guess. It's good anyway.

It definitely has some very trippy scenes.

His arm though, eugh.

That's just sick.

Garden State has a good trippy scene, but it's not a very trippy film. A good film, none the less.

alice in wonderland :D