But I’m not allowed to use it anymore because I set fire to a chocolate bar.

Huh. TIL.

https://kitchenroar.com/flammable/chocolate/

Chocolate, or more so cocoa, is highly flammable. If it catches fire, the blaze is difficult to extinguish since cocoa powder contains 10 to 20 per cent fat and has a huge surface area. Yes, chocolate is flammable. Most solid foods possess at least some level of flammability because they are organic, and chocolate is no exception.

See, I don’t see how one would have known that without having actually experimented and set a chocolate bar on fire, though.