When you sit on the toilet so long that your legs go numb.

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.

You know when you have to shit so bad that your intestines are cannibalizing themselves and cutting off the nervous system below your waist and you can't hardly move, or talk, or think of anything other than sweet relief and you lurch into the can and *oooooohhhhh*....

classic case of pooralysis