my one and only time:
i experienced nothing extraordinary, but my senses seemed to deliver more input than i could process although i had already turned off music and light… pretty soon i got awfully tired and went to sleep.
The one time I did acid I was incredibly happy and wondered how anyone could possibly have a bad trip. I didn't really hallucinate but I did see crazy patterns in the clouds and colors were more vibrant, especially with my sunglasses on.
I'd do it again if I was offered but I'm not going to go out looking for it.