What he came up with is this air-powered Nerf gun that definitely leaves a mark ... The grip is a gutted cordless drill whose battery doubles as the power source for the electric sprinkler ...

A 20,000-volt Tesla coil lightning-blasting Nerf gun. The finished article took Flickenger ... an old TV and a lithium-ion battery from a drill. The total cost came to around $800 (£500) and ...

Holding the nerf gun was Michael Kimball ... thanks to emergency preparedness drills at their school. Still, he keeps in mind that a tragedy can strike anywhere, at any time.