Not exactly a mugging, but more ‘aggressive panhandling’. I was walking down a back street in East Lansing (of all places, not known for muggings) and a shady homeless fella comes up to me and says “I want all of your money.”
Me being the invincible young nerd that I am (read: stupid) said “Oh, the old ‘your GP or your HP’ concept, eh? Well man, it is rough all over and it is going to get a lot rougher if you don’t back the fuck off.” I think this confused him, as he just kind of wandered away. About 20 minutes later, it hit me how incredibly stupid that was.