"Gassy" ball python?

[Greymoon]

First of all, I am sorry that I just joined this forum to ask this question... I swear I am not a troll. >.<

My roommate has a wee ball python that I believe is about 2 years old. I know NOTHING about snakes, and her snakey is her responsibility--I fully admit to sorta giving a wide berth when snakey is out, just because I'm not really used to being around them, because really, her snake is probably one of the most chill critters I've ever met.

However, that said, I did want to check to make sure something is "normal". Earlier this evening, roommate and I were upstairs chatting, when suddenly we hear what sounds like... I swear to god it sounded like we had a horse in the room with us farting. We look up and see it's coming from her snakey--who has immediately drawn the attention of all five cats with his movement and horrendous noise, and is actually sitting on his log with his mouth open while continuing with this noise. She thought at first that he was suddenly being deathly ill and trying to regurgitate, because he did honestly seem to be having some sort of gag reflex, but when we investigated (seriously, this noise went on for something like 30 seconds solid) he certainly had not regurgitated--but there was a very small amount/line of what looked like maybe liquid poo that had clearly been ejected at high speeds.

It was then that we surmised that poor snakey had just had a horrible horrible case of the toots and was making faces due to the discomfort of all that gas moving around. Afterwards he seemed perfectly fine, moving around and generally being his snakey self.

Thing is, it was so startling that I want to make sure on her behalf that something like that IS normal.

So... any advice on the normality of the mysterious farting snake would be greatly appreciated. (FWIW if it matters, he was last fed ~2 weeks ago, is due again, and he is fed frozen mousies, nothing live.)