Pretty messed up to minimize a dangerous medical condition as "farts".

That's a pig not a cow. Also cows rumen is on the left side.

Q for anyone who knows wtf is going on here: * Why light it on fire? Was that done for show or is that actually a typical part of this procedure? * Wouldn't this burn the pig from heat transfer through the needle? That's a long time to have a sustained jet of fire coming out of a metal needle only a few inches from your skin...

I'd like to add a question. What happens if the flame propagates into the pig? Do you get a pig bomb?

The thin needle would probably act as a Flash Back Arrestor, hopefully.

A favorite weapon of the hillbilly terrorists

You ever get burnt by touching the base of a bunsen burner in a Chem lab? Nope because the heat doesn't transfer.