A 12-year-old British boy suffered burns to 18 percent of his legs after he blew up a gas can while lighting his flatulence on fire.

The boy and his cousin were breaking wind and setting it on fire as part of a competition in the garden of a Tipton house when the accident occurred.

The gas can was behind the boy when he ignited his flatulence that in turn caused the gas can to flash.

Firefighters were called to the scene but the blaze already had burned itself out by the time they arrived.

The boy was treated at Russells Hall Hospital in Dudley for burns to the back of his legs and thumb.

Butthead.