I accidentally ate a pot brownie once and it was to the point where I had accepted my fate and was ready for the impending death. I wasn't given it, though. There was just a tray of brownies in the fridge and I ate one. It was terrible, too. Still didn't realize it. There wasn't anybody home to let me know, either. I just laid on the couch and was like "Well, this is it, bud. Your time is up." and ended up falling asleep.
It actually end up spinning me into a near 48 hour long Vertigo spell that was one of the worst things I've ever experienced.