"MythBusters" cannon misfires

A hole near the master bedroom window of a Dublin, Calif., home marks the exit point of an errant cannonball, fired during a filming of an episode of the Discovery Channel's "MythBusters" on Dec. 6, 2011.

Sheriff's deputies are still measuring how, exactly, the cannonball flew from a bomb range in the rolling hills flanking a suburban San Francisco Bay area neighborhood and rocketed into the front door of a home and through its master bedroom before landing in a neighbor's parked minivan. No one was injured.

AP Photo/ Bay Area News Group, Doug Duran

A Dublin Police officer stands near the exit hole of a cannonball in the second-story wall after it traveled through a home in Dublin, Calif., on Dec. 6, 2011. The cannonball was misfired during the taping of an episode of the Discovery Channel show "MythBusters" at the Alameda County Bomb Disposal Range.

Sheriff's spokesman J.D. Nelson told The Contra Costa Times that no one was injured and the home's residents didn't even wake up until the dust had settled.

A member of the Alameda County Bomb Squad stands next to a minivan on Springvale Drive after it was struck by a cannonball in Dublin, Calif., on Dec. 6, 2011. Before landing here, the cannonball traveled through a home a few blocks away on Cassata Place after being misfired during the taping of an episode of the Discovery Channel show "MythBusters" at the Alameda County Bomb Disposal Range.

Jasbir Gill cleans the broken glass off his driveway after his minivan was struck by a cannonball in Dublin, Calif., on Dec. 6, 2011. Before landing in his minivan, the cannonball traveled through a home a few blocks away after being misfired during the taping of an episode of the Discovery Channel "MythBusters" show at the Alameda County Bomb Disposal Range.

AP Photo/Doug Duran - Bay Area News Group

A member of the Dublin Police department and an Alameda County Sheriff stand outside a home on Cassata Place after it was struck by a cannonball in Dublin, Calif., on Dec. 6, 2011.

Children gather at the front door of a Dublin, Calif., home where an errant cannonball fired during a filming of an episode of "MythBusters" entered the home on Dec. 6, 2011.

A photographer stands outside the Dublin, Calif., home damaged by an errant cannonball fired during the filming of an episode of "MythBusters."

"MythBusters" stars Adam Savage, right, and Jamie Hyneman approach the home damaged by an errant cannonball fired during a filming of an episode of their show, Dec. 7, 2011, in Dublin, Calif. They were not present when the accident occurred the day before.

"MythBusters" stars Adam Savage, left, and Jamie Hyneman approach the home damaged by an errant cannonball fired during a filming of an episode of their show, Dec. 7, 2011, in Dublin, Calif.

"MythBusters" stars Adam Savage, right, and Jamie Hyneman speak to the media on Dec. 7, 2011, outside the home damaged by an errant cannonball fired during a filming of an episode of their show, in Dublin, Calif.