If you have a gun under the counter, f--- them mofos. But make sure it is loaded and you know how to shoot. Some crazies don't want to leave witness behind which is you. So your life is 50/50 so don't take chance. There are many cases even when you give them everything, they fire eventually and kill the clerk. It is so sad that a person's life is worth a few thousand dollars sometimes hundreds. It is getting worse and worse these days especially Texas.