Who says the running back has to be a quick, shifty type?
Not in this Pee-Wee Football League, where the tailback is the biggest dude on the field and imposes his size upon a safety attempting to make a tackle.
It's a violent collision with the safety (and the ground) taking the worst of it.
Many youth football leagues have regulations on the weight limit of ball carriers. Apparently this one doesn't...yet.