From the UK riots of 2011:

There were a lot of them. We came out of our shops but the police asked us to do nothing. But the police did not do anything so, as more came, we chased them off ourselves.” The staff from a local kebab restaurant ran at the attackers, doner knives in their hands. “I don’t think they will be coming back,” Karagoz said.

From the Los Angeles riots of 1992:

“I want to make it clear that we didn’t open fire first,” said David Joo, manager of the gun shop. “At that time, four police cars were there. Somebody started to shoot at us. The L.A.P.D. ran away in half a second. I never saw such a fast escape. I was pretty disappointed.” ‘Please Call Ambulance'”

Remember, the police have no legal responsibility to protect you.