Edit: In response to negative karma because of this video, allow to explain why I picked this clip. The movie here is called The Drifting Classroom, a Japanese 'horror' film based off the manga of the same name, which also happens to be my all time favorite manga and horror anything. It's sort of like Lord of the Flies meets Battle Royale, but far more terrifying and scary.
The reason I picked this clip was to show how bad this movie is. A peeing alien? Kids enjoying that? They fight over that thing? That never frickin' happen in the manga and with such a ludicrous scene, it pulls anyone right out of the movie and refuses to let anyone take this film seriously. Perhaps the musical number (That's right, a musical number) did that already, but this scene cements it. This is not a good horror movie and this a horrible adaption. This clip is being shown so that you can understand how bad this movie is and not because I find it entertaining.