Way back when younger and dumber I drove an old Ford wrecker that had headers, glass-packs and the exhaust pipes shot out the side just in front of the rear wheels. Feeling particularly evil for no apparent reason one day I saw a bicyclist on my side of the road and decided to mess with him. I cut the ignition, blipped the throttle and just as the pipe was right next to him, I hit the ignition... the boom was QUITE impressive and I can only assume that that blast of exhaust and boom made him think he had been shot by the way he dived head-first off that still moving bike into the ditch!
Yes, I will probably roast over that one for a while but, at the time, I LMAO for several blocks.