Yup, also Psycho Mantis does the same on Twin Snakes, but with different games, both from Nintendo and Silicon Knight's own Eternal Darkness.
Speaking of diarrhea, in MGS V, you'll eventually find a rather peculiar tape that has the recording of some poor sod emptying his bowels (presumably Sasaki's father), if the enemy's searching for you, you can hide in one of the many toilets scattered in almost any base and when an enemy gets near, you can play that tape on the loud speakers and they'll simply leave you alone.
Stuff like this is why I love the series in general