But what do you do when a crowd comes in all at once? And it's not just any crowd, but a crowd with a plan to rob the place.
On Saturday, St. Paul police say 50 kids swarmed a Holiday store on Wabasha, a so-called mob theft or mob robbery. They stormed in together, their numbers overwhelming and just started stealing.
"They steal your basic convenience store type of goods and run out," says St. Paul Police Department spokesperson Andy Skoogman.
It's the second incident like it in St. Paul in less than six months. Last fall, surveillance cameras at a BP station on Lexington captured some 20 kids coming into the store at the same time. They stole merchandise and one of them assaulted the clerk on the way out.
note: "flash mobs" and "kids/youth" are media and political phrases to describe black criminals between the ages of 12 and 45.