Young skinny dude at register. "Ouch!"
Me. "You didn't prick yourself on that artichoke, did you?"
Him. "Oh, is that what it is? Yeah, a little."
Me. "You have 5 minutes until your throat starts to swell and your vision dims, 10 minutes before it becomes almost impossible to breathe, you can't see and you lose control of your bowels, and 5 minutes later you go into cardiac arrest."
Dude. "nuh uh..., really?"