BeatlesCapo

I hadn't really given this much thought, but a few weeks back, I had some very interesting brownies. They started out normally, with the usual changes to my vision and perception, however about half way through, they got weird. I began having open-eye hallucinations (something I've never had from pot before, not even on my first time high. The first time I had open-eye distortions, but never actually hallucinating things that just weren't there.): most notably, I saw little happy green men waving at me from the sidewalk, and spaceships made entirely out of rainbows. I also threw up about halfway into this, something that has also never happened to me off of pot. (I chalked it up to eating too much, since I had the munchies.)

However, I am now wondering if the pot could have been laced with LSD. Ordinarily I would not consider lacing drugs much of a possibility, since it isn't efficient for the dealer, but LSD can be attained for large quantities quite cheaply, and could theoretically be a good way to fool inexperienced smokers into thinking that average pot was actually very high quality stuff. Thus, my question is this: Has anybody ever experienced this kind of open-eye hallucinations off of marijuana, or does it seem likely something else may have been involved?

I don't care terribly whether it was laced or not, since if it was, thanks for the awesome experience to whomever did it (though I suppose I shouldn't be buying from somebody who laces his stuff, as it happens the herb was attained by a friend). This is more just to satiate my own curiosity.

Thanks a bunch,
Capo

P.S. We baked the brownies ourselves, so there was nothing funny in that stage.

EDIT: If it makes any difference, the little green man was physically -inside- the sidewalk, not standing on it.