Today, I am to start drinking a half gallon of this Gavilyte crap to cleanse me of... well, crap. I can't seem to find anything about how long I should be expected to be on the toilet. The paperwork they gave me says nothing of the duration of the crapping, and I need to know, because I want to time it to where I'm done crapping before I go to bed. Last thing I want is to wake up in a sea of poop.

So... anyone?