Not sure about farting but don't eat extra mature cheddar sandwiches before diving a RB. I've never had to flush the loop so much!!!! I'm going to France in a few weeks and am genuinely concerned about ongassing the festering garlic and wine vapours escaping from my guts into the loop
Do I miss buoyancy control through the lungs, no. Do I forget and breathe out and wonder why I haven't moved? Yes.
However, it is sooooooo nice being able to frog kick hovering 1" above silt and knowing that you could stay there all day without disturbing anything.