Anything by Greg Araki, "Dead Man" and "The Wall". OH, and "Wizards" was pretty trippy, too. (No, not the friggin Fred Savage movie, the animated movie.)
it is the oddest film ever with an even odder trailer... oh 'The Trip' is quite trippy.. if anyone has any idea of what Gozu is actually about please tell me i've watched the DVD about 10 times now and only have faint ideas...