Don't Worry – I Left My Pocket Knife at Home.

Three-year-old boy to mom, noticing police officers nearby: Don't do anything bad while you're here. Okay, mom?
Mom: Okay.

http://feeds.feedburner.com/~r/overheardinminneapolis/~3/319181011/its-going-to-be-hard.html

Overheard by: an amused barista.