Farts are pretty flammable.
Of the three main gases in fartsnitrogen, methane, and hydrogenmethane and hydrogen are both highly flammable. Nitrogen’s not.
According to the statistics we found, over a quarter of the idiots who try lighting farts get burned.
The rest are treated to a barely visible show of yellow and blue flames, as well as a putrid odor.
If you would like to try it, be safe, and remember, safety first. A trip to the doctor or hospital because you burned your hole would be quite embarrassing.