A few years ago, a rumor started going around the casino world. There was a crew of Russians hitting up casinos across the U.S. They'd roll up, find their favorite slot machine, play for a couple hours, and walk out with thousands of dollars. They didn't lose.
All of it was caught on camera, but there was no evidence that these men ever physically tampered with the slot machines. There was, however, something unusual about the way the men played: They always kept one hand buried in their pockets or in the bags they carried with them.