![](http://i.kinja-img.com/gawker-media/image/upload/s--4WufVkMP--/c_fit,fl_progressive,q_80,w_636/1338598599189398632.jpg)
Contrary to popular belief, it’s probably not methane leaking from behind that reckless “bros” light on fire (known as pyroflatulence); rather, it’s most likely primarily hydrogen.
http://gizmodo.com/the-truth-about-your-flammable-farts-1717433313?utm_campaign=socialflow_gizmodo_facebook&utm_source=gizmodo_facebook&utm_medium=socialflow