It’s probably best if we all just come clean and admit that we’ve all thought about this at one time or another: if you were floating weightless, could you fart yourself into motion? I mean, your butt is basically just an integrated bio-ass rocket, right? As you’d expect, it’s more complex than you think, and real astronauts have tried it.
Source: Can You Use Your Farts To Propel Yourself In Zero Gravity?