I've heard my snake make some super weird noises. One night I hear the awfullest noise like my ball was coughing up a rat. All raspy and nasty. It woke me from a dead sleep. I flip the lights on... Big ole' steamy pile!!!
With feeding her might have pushed some air out.
My guys noise still didn't match pooping! I've checked for RI, so I know it wasn't that.
But yea, my two cents! ;-)