Employees at the pizza parlor noticed that their new customer looked "agitated," but were not otherwise suspicious. He ordered a beer and some pizza, and then had a seat in the back of the dining room. According to an employee, "As he sat down a cop walked in and saw the guy. Then the cop asked me if the guy had been here that long, and I told him 10 minutes tops.... That's when the rest of the cops came in."
You may be thinking, that's a pretty good response time. It is, but on the other hand the cops did not have too far to travel, since the Yuma police station is basically also right next door to the bank:
The story is very similar to another robbery in San Francisco, which you can also read about at Lowering the Bar. Link -via Boing Boing