A Des Moines man is accused of flattening a tire on each of four vehicles in a bar parking lot recently because he was not able to get any natural weight loss pills from a bar patron.Apparently assuming one of the cars parked nearby belonged to the man, Harrison used a razor blade to slash a tire on each of four vehicles, the detective said."I guess he didn't know what car the guy was driving, so he made everybody pay," said Ron Biondi, the owner of the bar. "One of the cars belonged to the bartender.