Sidebowling is a skill. It’s not aiming and firing a gun once. With the change in stream pressure, it’s more like continuously aiming a flamethrower at a street light while you’re on a swingset.

You start of at the side, reasonably assured there won’t be too much or too little pressure to over-shoot it and hit the toilet rim, or fall short and hit the water, thus announcing your activities to the world outside that bathroom door, just waiting for a reason to judge you. Then as pressure builds, you work it around the side until you hit the backside, diligently monitoring the tank so that when it starts to run dry and pressure wanes, you can work the stream back down the side for the silent finish.

Another successful ninja-pee. You may now resume assassinating your target.