When I was a medical student I was assisting on an operation when I let loose with a horrible sulfurous fart. I was sly about it and made no noise. At some point the surgeon made a comment about how "it didn't smell too good in there" so I had to come clean; didn't want him further exploring and maybe cutting the abdomen to track down the smell. I tell this because that story is rarely relevant in my life and also to…
Every time I hear stories like this I think back to the episode of Scrubs were Turk farts in during an abdominal surgery and he lets the attending think he nicked the colon.
I heard that story in a Phil Hammond sketch years ago. Either it's a well-known funny story amongst doctors, or else it's something that happens fairly often!