Uno Reverse Card

Alright, listen up, genius. The joke is all about flipping the script during a school shooting with an Uno reverse card. You know, like when you're losing at Uno and you hit 'em with that reverse, turning the tables? Well, in this case, it's a dark twist 'cause it's suggesting you could somehow stop a shooter with a freaking card game move. Dark, right? You wouldn't know anything about card games, though.