Surprisingly good!
I must admit, I went into this movie a bit skeptical. I simply thought "Oh god, another 15-second long animation of some guy getting hit by another guy". How wrong I was. Some of the animation in this, although a little quickly paced, puts real Flash authors to shame, it's really that good. Some of the little details really make it a step above the rest, like the way each bullet shell exits the gun completely differently, or the realistic flipping of the skateboard.
Also, it brought a smile to my face every now and then. The way the text only appears for a short time makes this all the more funny, especially that "Yo mamma" remark.
Overall, very well made. A couple of mistakes here and there, but nothing worth commenting on in this review. Well done!