I've seen something similar...
A guy stole a toy gun from the stationary store. Walked 3 stores over to the pizza shop and tried to rob it at gun point with his jacket covering part of the gun(this was way before the orange tip on toy guns). The shop owner pertained to comply with robbers demands as he reached under the counter w/ his other hand & pulled the trigger on his pistol grip sawed off 12ga. Blew a giant hole through the counter. Suspect was laying in a pool of blood & died on the spot.