Funny Story:
Tuesday during my birthday dinner, which was at a fancy restaurant, but in the bar area (she forgot to get a reservation), I suddenly smelled marijuana. The people sitting next to us smelled it, too, and called over a bartender, asking about it.
"Oh, it's a cigar," he said, gesturing toward a lone cigar smoker at the bar. A second later, I smelled the tell-tale scent of incense. It HAD to be an ACID.