An annual pillow fight at San Francisco's Justin Herman Plaza at the base of Market Street drew a large crowd Friday evening.
Participants armed with pillows will gathered at 5:45 p.m. ready for battle in the light-hearted Valentine's Day tradition that sends feathers flying for hours.
Those attending were encouraged to dress up to set the mood for the flurry of pillow smacking.
The city's Department of Public Works is prepared for the mess that usually accompanies the fight.
Department spokeswoman Rachel Gordon said a dozen employees are "ready to go" with a truck, dryers, a mechanical sweeper and other cleaning equipment.
The estimated clean-up cost is $4,300, she said.
"This has become a San Francisco event," Gordon said. "People have a lot of fun with it."