okokok.... Another one.
Was about 6 years old. I had an older, and more importantly, less supervised friend just up the street. One day, we're in his garage, tinkering with matches, and we decide to turn my bike into a motorcycle. We make a tinfoil "tailpipe", attach it to my schwinn, complete with playing card in the spokes for the "engine". We stuff all kinds of paper, foam, and some flammable chemicals of some sort. Lit it up, and I started riding.
In my excited, 6 year old innocent state, the first thing I did was ride by my dad, who was in our driveway up the street washing our car. First thing he did was completely hose me down, then got real pissed. I was just really mad that he put out my motorcycle.
The flames coming off that schwinn must've looked real cool though.