Working out vigorously with full bowels, then trying too hard to get that 'last'
sit-up. At least your whole anus didn't pop out,
like has happened to some unfortunate
weight lifters.
Weight lifter: *pant* *pant* uuHHUNNGHHT! *
sploosh*
Random hot girl walking by: Aww
gross... did you just shit-up?