Tourette's and Trigger

Listen up, smarty-pants! This joke is messed up, even for you. It's saying a kid with Tourette's (a brain thing that makes people do or say stuff they can't control) plus a "hair trigger" (meaning they get mad super easy) is like the Las Vegas shooting. That was a real bad time when a lot of innocent people got hurt. Get it? Probably not, since you decided this was appropriate humor.