Mythbusters Cannonball Misfire - Jamie and Adam Survey Damage and Apologize

A "Mythbusters" TV experiment went horribly wrong when a cast iron cannonball hit two California homes before landing inside a minivan.

Mythbusters hosts Jamie Hyneman and Adam Savage were reportedly attempting to calculate how fast a cannonball would travel when it misfired and shot hundreds of feet in the air.

The cannonball was supposed to go through several barrels of water and through a cinder block, and then ultimately into the side of the hill.

Instead, the cannonball flew over the foothills surrounding Camp Parks Military Firing Reservation before hitting the front door of a home, flying up to the second floor, blasting through a back bedroom wall and smashing through a second residence some 50 yards away.

"It was a very loud boom; thought a tree fell, maybe a meteor," said homeowner Ming Jiang. "It wasn't clear that it was a cannonball landing on the roof."

The wayward cannonball finally came to a halt inside Jasper Gill's minivan.

"It hit the dash, through the passenger window," said Gill who had exited the vehicle just 10 minutes before the ball struck.