Literally: Once when I was about nine I dropped a kleenex on a stove burner. The kleenex of course went up in flames along with the sleeve of my fortrel dress (basically hideous precursor/byproduct of polyester – hey it was the seventies!) Fortunately, my dad was standing nearby and put the fire out. I was probably lucky I wasn’t badly burned.
Figuratively: That’s a tough one, I haven’t been on fire for quite awhile. I know that I have been on fire with anger quite a few times which can be dangerous both for me and for my target. I would rather be on fire with creativity more than anything but it is far more elusive.