Here's one to avoid
My son found this "fart in a can" stuff at some novelty store. The spray can is small enough to fit in your pocket, and it produces about the same smell as a couple of pounds of bush's baked beans mixed with cabbage. :)
We tried this at a table once where a guy was just simply obnoxious, telling everyone what to play, etc. And he got irate when someone farted and sullied "his breathing space".
My son gave a shot of this under the table, the guy goes "Jesus Christ, someone just crapped in their pants!" However, someone else said "Hey, I smell a little phosgene in that, that could be dangerous."
We promptly got the hell out.
Didn't want to be held as terrorists or any such crap. :)
BTW it cleared the obnoxious one out post-haste. :)
Casino life can be funny... :)