It was already late in the evening when you walked through a dark tunnel to go home. Suddenly you heard two motorcycles pass you and didn't think much of it. When they were out of your reach you heard a loud crash, it sounded like an accident! You ran off and when you arrived you saw a young man lying injured next to his broken bike, moaning in pain. The two on the other bike just laughed and drove on. Were they to blame?

What will you do? He was sitting up but still bleeding on his head.