Yet somehow Dunlop did not realize the .38-caliber handgun he was using as part of the class demonstration was loaded.
Dunlop unintentionally discharged the weapon. The bullet ricocheted off a desk and struck one of the students, Michael Piemonte, in the right arm.
Piemonte was taken to the hospital for treatment and released later that night.
"I am thankful that it only ended up being in my arm," he said. "And didn't hit my wife or individuals sitting at the desk behind me."
No charges have been filed. The sheriff's office called it an "accidental shooting."