I operate off the theory that "this was in college" is pretty much all the explanation needed.
One night after studying too hard and eating some mystery meat in the cafeteria that was having a very unfortunate effect, we decided to light our farts on fire. If we felt one coming on, we got in the "fart fire" position and lit it. A good friend of mine set her pants on fire and then, instead of jumping in the shower, she ran outside and rolled on the grass. She ended up in the clinic with a butt 100 percent covered with 2nd degree burns.
But...this was in college.