Never lit any on fire, but I threw $100 in 20s and 10s at a girl once.
I was about 21 and one of my friends parents had a halloween party and let some of us come. They were super well off and drinks were basically unlimited, so we did what 21 year olds do and got fucking wrecked. My friends sister was back from her first semester at college and she had to prove how awesome of a drinker she was, so she was going extra hard, doing keg stands and shit. One of my friends said something to her like "i'll bet you $20 you puke in the next 20 minutes." to which I upped it to "I'll give you $100!". Neither of us were serious, we were just giving her shit, but some random ass lady runs up and says to me "I bet you dont even have $100!" I delivered pizza so pretty much all my money was cash back then, and I did have over $100 on me, but not much more. I kinda tryed to just laugh at her, but she was super insistant that I show her I really did have $100, and she went on about how I needed to pay up when the sister didn't puke. Anyway, she finally leaves me alone, sister doesn't puke and the night goes on. I blacked out from hitting the ice luge too many times. I wake up in the morning and gather my things and exactly $100 is missing from my wallet, and I have no idea what happened to it. Finally, I talk to one of my friends who was there and she tells me that the crazy lady cornered me later on at the party and started yelling at me and calling me a chump for not paying my buddys sister $100 (sister didn't care, she knew it wasn't a real bet and never hounded me or my other friend about it). So in a blackout I pulled $100 in 20s and 10s from my wallet and threw it in her face, told her to leave me the fuck alone and walked away.
Not my proudest moment.