You don't trip on Absinthe, or atleast not as they suggested in the movie. I hear these kids talk about it all the time, saying "yo I saw mad people and crazy shit just poopped up." They're full of shit. It's the same with mushrooms. People always just say that they saw all this shit because that's what they heard was "supposed" to happen. You don't trip in the sense that random things suddenly manifest... You get shit like walls bow and patterns rock your world but I mean if you drink enough of anything the effects aren't far from that. The thing with Absinthe is that, I've HEARD, one of the chemicals in it stays in your spinal cord after you've done it; Mimicing the after effects of taking acid, the way that the chemical is stored and can be released and cause a trip if you crack your back the right way or if you excersise excessively. But ya... I highly doubt you truly "tripped."