something like that happened to me , i was riding along and it was like BOOM there was a small fireball and i was a little stunned. i put my bike on a tree and looked to see what it was , there wasa wine bottle that was busted up,i saw the bottom intact after the fire went out , i found a grill igniter with 2 wires hangin off it , i guess i hit the button when i ran it over and it blew up the gas or whatever in the bottle , i dont think it was powder cuz it made a flamy fire, oh well,m it was in a little pit, :confused: