Mythbusters Cannon Ball goes astray

http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2011/12/06/BA1D1M99V5.DTL

No one hurt. It missed the water filled target, went into a house, up the stairs, then out the other side of the house then into a parked minivan.

I hope they show the segment. Since they're about teaching as well as just stunts it would be a good chance to show what went wrong and how they'll protect against it in the future.

I'm looking on Google Maps now trying to see if I can figure out where the range is with respect to where the cannon ball went. The exit hole was pretty clean, looking like it was still going at a fair velocity, and it still went into a car across the street.