...at least I think. I was out mowing a few days ago and was winding the spool on a trimmer when a cop pulls up and motions for me. I walk over and he says, "How long have you been here?" I said,"about 20 minutes why?" He replies, "someone phoned in saying they heard a gunshot in this area about five minutes ago, did you hear anything?" I said, "no, I had the mowers running and couldn't hear anything over them, sorry." He said thanks and drove off. After he drove off, I realized when I shut off one of the ZTRs, it back fired, someone must have thought it was a gunshot. BTW, yes I do know you are suppoesed to let them idle to cool down to avoid back firing.