I caught several piles of garden waste on fire when I only wanted to lite one pile to burn. For some reason, I guess the gas fumes ignited and all of the piles went POOF! all at once. It scared the $%^& out of me!
I made the mistake of throwing my brothers birthday candles away without running them under water first. The whole trash can started smoking lol Luckily, it didn't technically catch fire but it's the closest I've ever gotten to accidently burning our house down!