It could have been just a short animation. Tests can be longer or even shorter so that shouldn'e matter. I gave blam points, so you can post a somehow finished work.
I think you should find someway to have feedback from other people on your previous tests to a release. The portal its not suposed to be for tests, it's written somewhere.
Try finding someone to show your aniamtion tests at the forums etc, getting a feedback about what youre doing its called to be bart of the work.
And well the fact that you have to explain the joke its actually a Fail.
An animation works when people understand it. Then if your pourpose was a jocke entretainning it must be fun. I dont say its not fun, i can't tell because u just spoiled the gag so i cant give opinion about the fan fact that parapa rapers are made of paper.
If you just wanted to make the jocke try to focus on the gag understanding. The Sound musn't distract the action, and if you include a sound it has to be a clearly descripting one, a clear paper tearing.
Also you may use some good timming, doing this with a rythm and making the high spot in the correct moment its half of the animation work, althought there are no rules for that u just have to be good at it by experimenting and learning from animations.
So blam this and share it privatelly with freinds until you come up with something cool, not just 1 spoiled gag in a test.
Cheers
(i dont mind it being a test i do test animations at class, but this is just not the place)