Ok 2 situations here
1 the people come out of the cab and show the money to the camera and then a guy pulls out a gun and robs them.(maybe not that funny)
2 they call a friend and there not there.(has that ever happened?)

1. chris, I make it a point not to rob people who have tv cameras pointed at them, don't you?

I've seen episodes where their mobile shoutout didn't answer. They don't get the chance to call someone else. Sometimes they edit out the entire fiasco and cut to their wrong guess.