At first glance I am thinking you used some ketchup on that ball. No matter what you did it is very different effect. I am sure you took the photo of the ball as it was moving and the biggest issue with that is the ball is slightly out of focus, possibly an unsharpening mask might have helped with this.
The composition isn't bad the idea is definately there and it obviously meets the challenge.
Untill it was hit by a paint ball? I can see some stuff bouncing off of the ball. Pretty good idea, and a great shot (lighting, focus, shutter speed, etc). 7.