The way liquid squirts is weird

Have you ever noticed while peeing that sometimes that a drop that gets ejected over the rim? Well, is that pee or water? It is hard to tell. As a kid I always wondered.

I think I have discovered the answer. I recently noticed a similar occurrence with coffee and creamer. In this instance I poured liquid half and half in my coffee. I noticed the creamer shooting over the rim and not coffee.

Logic would seem to require, like doing a cannonball into a pool, that your downward moving force displaces the immobile static liquid and thereby sending it upward, like a seesaw or catapult. Yet what I observed seems to contradict that, the cream not the coffee shot upward. Therefore I can only assume that that it is pee shooting out and not water as well. Can anyone verify and/or explain why this is?