I was in one of the pet shop chains looking for water bowls, and stopped to admire an adult male hypo they had in a 40 gallon tank. A young man was asking if the snake was tame. The clerk, who looked to be about 18 years old said it was a corn snake and corns never bite. I spoke up and said they usually don't bite, but can mistake your fingers for a prey item. The clerk just laughed and said I was wrong, and reached in to pick up the corn, which immediately latched onto her hand. She screamed and pulled both her hand, and the corn, out of the tank. The corn let go of her hand and I grabbed him and put him back in the tank. Her hand was bleeding, the prospective buyer beat a hasty retreat, and I left without buying my bowls.