A huge wave crashed into a crowd of 200 people this morning at the Mavericks Surf Contest north of Half Moon Bay. Many people were swept off their feet, and thirteen suffered injuries, a few of whom were taken to the hospital. Luckily no one was swept out to sea.

The victims were reportedly in a place they shouldn't have been. Spectators were later told to watch the contest via live webcast, and organizers were selling tickets to a viewing event at AT&T Park in San Francisco. The National Weather Service had issued a high surf warning in effect until 10 p.m. tonight.

SanFranVideo captured the whole scene in the above footage. Check out SF Appeal's and SFGate's coverage, along with Beth Spotswood's first-hand account.

Be careful on those beaches, Everyone! Scary stuff.