Are there handguns small enough to fit inside a Petri dish? Or do you just aim the handgun at the Petri dish? Does the handgun need to be loaded? If it must be loaded, will blanks suffice? Does a larger caliber reduce the time needed to aim the handgun at the Petri dish? Is there a specific distance to the dish from which one must aim the handgun? Are rifles, shotguns, and machine guns specifically excluded? Will a sword work? It’s generally made of the same kind of material as a handgun. Is it necessary to stand on a chair while wearing a lab coat while aiming the handgun? Can two hands be used to aim the handgun? Does engaging the handgun’s safety have any effect on the contents of the Petri dish?