This was a zombie movie that came out a number of years ago. It started with a bunch of teenagers who were doing motocross in the woods and one of them does something stupid and gets injured pretty badly. The friends get an ambulance to come but are informed at the hospital that their friend is dead. They see him being taken to a secret facility, and so they ride there on their motorcycles and try to infiltrate the place. It;s a secret government lab(of course) and one of the head scientists is the father of one of the people there to rescue their friend. I know this is vague, but it came out probably five to eight years ago, and played on Sci-Fi once. If anyone knows this or even knows the listing of Sci-Fi movies, I would be much appreciative!