Adventure Helmet

First of all, I know this was really stupid. I was playing around with bug spray and a lighter (maniacally laughing as I shot flames from the can), and after spraying some flames I noticed something frightening and bizarre. A blue flame was silently curling along my thumb. I stared at it for a moment, and in a burst of panic swatted my hand to put it out. However, I realized I had felt almost no pain aside from a small stinging sensation, and that there was no sign of damage where the flame used to be. How did this happen?