Firefighters with the Marin County Fire Department's Tamalpais Fire Crew monitor a backfire as they battle the Valley Fire on September 13, 2015 near Middletown, California. The fast-moving fire has consumed 50,000 acres after growing 40,000 acres in twelve hours and is currently zero percent contained.

Andy Conrad, Google X // Medium

Elizabeth Cabraser, Lieff Cabraser Heimann & Bernstein, LLP // Lawdragon

Participants piles each other with pillows at the the third annual Valentine's Day pillowfight in Justin Herman Plaza Thursday evening, Feb. 14, 2008. [X]press photo by Stephen Lam

Michael Bradley of the U.S. men's national soccer team warms up before a friendly soccer match against Azerbaijan men's national soccer team in San Francisco, California May 27, 2014.

San Francisco Sheriff's Captain Kevin Paulson (C) and Eliana Lopez, wife of San Francisco Sheriff Ross Mirkarimi (R), cheer with a group of inmates after dancing together in opposition of violence against women in a One Billion Rising event at the San Francisco County Jail #5 on Valentine's Day in San Bruno, California February 14, 2013. The event, with participants from 250 countries performing a choreographed dance routine on a day associated with romantic love, aims to raise awareness about violence against women in which one in three women across the globe will be raped or beaten in their lifetime.

Jill Corey (below) reacts while wrestling with Dan Robertson (above) as holiday revelers dressed as Santa Claus gather in Duboce Park during the SantaCon event in San Francisco December 14, 2013.

Jay and Rie Dion, Atelier Dion // San Francisco Chronicle

Kendra Wood, San Francisco State Softball // Golden Gate [X]Press

Jed York, San Francisco 49ers // San Francisco Chronicle

Carolina Panthers' Jonathan Stewart (28) leaps over the goal line to score a touchdown against the Denver Broncos during the NFL's Super Bowl 50 football game in Santa Clara, California California February 7, 2016.

The San Francisco Giants celebrate after defeating the St. Louis Cardinals to advance to the World Series after Game 7 in their MLB NLCS playoff baseball series in San Francisco, October 22, 2012.

Brad Waldron, Kali Protectives // Element.ly

A demonstrator sits in front of a street fire during a demonstration following the grand jury decision in the Ferguson, Missouri shooting of Michael Brown, in Oakland, California November 25, 2014. The grand jury decided on Monday not to indict a white police officer over the fatal August shooting of an unarmed black teenager.

Cooked whole crabs occupy a section of the counter at Swan Oyster Depot in San Francisco, Calif. on Tuesday, April 2, 2019.