I've had lap surgeries, and the gas aching your shoulders is a really weird feeling. I had just had my gall bladder removed, and had a ticket to the second Hobbit movie, opening night, in fancy-vision, whatever the hot cinema tech was at the time. Sat through that bitch, not a short movie, in pain, mostly from the gas. Harshest movie experience to date for me, and I've been to a lot in the theater.
Of course, also hard to keep the farts in; poor bastards around me may have suffered a bit too. Packed theater, keeping it quiet - who's to know?
Get better soon - and stay out of theaters for a few days ;)
Also the best are giant morning farts! Or so my wife claims, I don't really have much to offer after going carnivore.