A 16-year-old would-be robber clearly didn't read the instructions.
The kid barged into a 7-Eleven in Dania Beach, Fla., Tuesday night and pointed a rifle at the counter clerk, reports the Miami Herald.
Then he paused a moment to try to load the .22-caliber gun — with .40-caliber ammunition.
"He's trying to cram a .40-caliber bullet into a .22-caliber rifle," Broward County Sheriff's Office (search) spokesman Jim Leljedal told the newspaper. "It's like twice as big as the gun will fit. It won't go."
Despite his weapon's lack of deadliness, the teen pointed the gun again at the cashier and said, "Give me the money — don't make me do this."
Three customers saw their chance and jumped on the gunman, tackling him, kicking him and finally standing on him until police showed up.
The boy was arrested for armed robbery. Broward County has not yet decided whether to charge him as a juvenile or as an adult.
