Phi Krappa Zappa

We were at the restaurant the other night and the owner brings 0ut this electronic tennis racket and does a couple swings in the air. I am intrigued at this high-tech gadgetry and ask him in my broken Korean "What?" To which he replies in fluent Korean... something. I take it and turn it on and am trying to figure out how it works. Maybe it makes different ball sounds when you swing it. A couple of practice shots show me that is not the case. I think maybe it makes a noise when something hits the racket so I touch the head... Kkkrrrzzzzzwww and a flash of blue light! It is a bug zapper and my finger has just simulated the path of an errant mosquito. Everyone is laughing and I hand it back to dude. The picture of Frank on the right? A zapper and a Zappa.