Robbery Under Arms Puns

So, my town has a major highway that runs through it, and a bridge that people can walk over. Well, some guy decides to tie a ball to a string and dangle it over the side of the bridge. That way, any car that goes under the bridge will think they hit something and the guy could have a good laugh. Well, a semi comes through, and the ball gets caught on the mirror. The guy's arm gets ripped clean off, and he's sent to the hospital right away. The truck driver gets pulled over as he's passing through another town. The arm is still dangling from the mirror. The truck driver is then arrested, for armed robbery. (Badum-tsss) (Thank you, thank you. I can't wait to get 3 whole karma for this one.)