It’s simple to do. All you need is a lighter or match. Place it close to your butt and let one blow. Be careful not to light your pants or hair or skin on fire. That would be bad. Don’t do that.

Fart lighting has been a popular subject in comedy for a long time. The movie Dumb & Dumber shows Lloyd, the character played by Jim Carrey, lighting a fart during a fantasy dream sequence. Because of a fart-lighting incident Howard Stern’s show was canceled by an NBC affiliate in Hartford. South Park also pokes fun at farts on fire when they said that spontaneous human combustion is caused by it.

The gases that form in the colon include methane, hydrogen sulfide, and hydrogen, all of which are flammable.