Oh boy, one of my favorite show, Mythbusters, had a big boo boo happen.

A cannonball experiment went astray the other day in the Northern California city of Dublin, wreaking havoc on a neighborhood. It bounced off the sidewalk and went through the front door of a family's home, past a sleeping couple, leaving a 10-inch hole in a bedroom wall, hit the roof of another home and then bounced across the street and went through the window of a minivan.
The cannonball was supposed to hit a few water-filled barrels and a concrete wall, but missed its target. According to Alameda County Sheriff Sergeant J.D. Nelson, who is also a consultant on the show, producers have shot off the same cannon at a firing range near that neighborhood 50 times without incident.