Flatulence question ?

Question

What makes an audible and/or large f**t suddenly push out?

Answer 1

the build up of gas (from bacteria in your stool) in your colon.  has to go somewhere and better out than in!

Answer 2

Your question is superbly worded.

The build up of methane gas, air swallowed, and the bacteria in the colon cause an increase in  the pressure in the colon and causes the "FA-pootz".  The odor is Methane gas.  The same stuff you smell when you pass a cow town.  To some degree the pressure can be regulated, in that when some feel the urge they may choose to supress it...out it comes, slow and drawn out and likely a silent and deadly killer, or push down like having a bowel movement ( VAGAL manuever) and cause an explosion making everyone help you look for your shoes in Kansas.

Unbelievable, the average person will pass gas up to 70 times a day without realizing it.

IT is true.