I wouldn't be surprised if his foot was injured but he failed to feel the pain on account of the twenty gallons of adrenaline that was instantly dumped into his system the instant he noticed the train. Hell he's probably still someone running for his life.
He hops the fence and is ready to run across the tracks, but then there is the 'oh shit' moment when he actually looks and sees the train and he lunges faster. Also needs an 'Essex' tag.