One of the supervisors at my old job let one slip.
When I first started working at my former job, it was a new center, so there were managers there from other states to help it start up. Mind you - they made you raise your hand like a child to ask a question, and to further humiliate you - they'd look at you like you were stupid for daring to ask a question. Anyhoo, I raised my hand and one of the supervisors came over to assist me. When he sat on my desk and leaned over to find the information in the system, he let one rip.
That was one of the most awkward moments of my life - I couldn't laugh - AND - I couldn't act like I didn't hear it - 'cause I was looking right at him when he did it. He even tried to clear his throat to cover it (after the fact???) and mumbled something about lunch. When he left - I was in tears (laughing).