Eliminating the uncertainty of the 2 a.m. fluid elimination

source: http://s3.favim.com/orig/160111/odd-toilet-people-buy-the-weirdest-things-afraid-to-pee-in-the-dark-Favim.com-3868723.gif

This eliminates the uncertainty of the 2 a.m. pee break when you don't turn on the light, because you want to be able to go back to sleep, so you aim where you think the toilet is, and adjust direction based on whether the stream sounds like it's hitting the water, the bowl, or the floor.