Kate says:

jamar, look at the stall door and how much off the ground it is, meaning that people can basically see you shitting if you are sitting there doing your business.. It is a big gap between the bottom of the stall door and the floor, which is big enough for a limbo dancer to get through if they can bend that far back, hence the "beware of the limbo dancer" which I found pretty lulzy…

clifton says:

no.. the hilarity arises from the fact that the gap between the door is small.

if someone can look under the door at you, you could see them too.

so, look at the permanently low overhang and imagine limbo occurring there. primo comedia.