I don't think I've ever hallucinated, but I've had some really visual experiences. Once I took 5 bong rips in a row of some great stuff, and when I looked in the mirror I could watch myself grow older and turn into a different person all together. My imagination was running wild, it seemed as if my hand had turned into a garden. The only thing missing was the actually visualization of it looking like a garden. I've seen animated shapes like talking faces and birds in trees and floor tiles and such, I don't know if that counts.

And I almost always get awesome close eyed visuals.