if one gets hurt doing something like this they can't expect their friends not to laugh. Now if they just stood around and watched him burn then that would be different.
Smart they had water nearby. I once set myself on fire with a model rocket engine experiment....I was only about 10-12...had to run to the back, open the 6' fence gate and then jump in the pool...fortunately only the impact of the rocket fuel caused any real damage.
About a 2"x2"x1" hole in the back of my thigh and a ruined pair of levi's.