What happens if I light a fart under Lava? - I saw Jackass today!

[Alex Hogendorp]

I recently learned how to light a fart under water and it blew my mind. Unfortunately my ass isn't immune to burning rock and I will love my ability to have gay sex if I perform it. So we can only come up with assumptions here.

 

[JethroTullamore]

NIGGERS

 

[Gravemind]

The ass gas will catch fire as you slowly drown in the lava.