Deep Questions

Over at Slate, the Explainer is the person in charge of answering reader questions. But there are some questions even the Explainer can't deal with, like this one:

I’m a tall guy. So when I pee, sometimes there’s a splash that exceeds the height of the bowl and lands on the floor. What is it that splashes? Is it water from the toilet or is it pee? I’m guessing it’s water from the toilet because the momentum of the pee takes it down and for it to splash out would defy the physics of liquids.