My daughters have dropped several things into my exhaust, most notably golf balls (3 of them) and on a seperate occasion a disposable lighter. I had no clue they were in there. So (with the golf balls), I go out to start the bike for the ride to work and it is bogging bad, I blip the thottle, still bogging, so I crack the throttle and I hear POOF, POOF, POOF. And look behind me to see two white and one neon green golf ball bouncing down the street. It must have launched them a good 100 yards. The lighter was good too, same thing, go out to warm the bike up for the ride to work and as I am walking back to the garage door I hear a LOUD bang, first thing I think is something catastophic just broke, but it is still humming along fine at a fast idle, so I crack the throttle and out flies the metal top to the lighter and assorted, half melted pieces of plastic. Now I stuff a rag in there when I know the girls will be playing in the front with the garage open. Fun Times!!