well, put him in an environment in which he doesn't know what's coming next (like the next branch, thing to jump on/ off of, grab, roll etc..) and you slow him down greatly. and, if it was a life or death situation, he'd be less likely to focus as well, and would probably try and do something stupid and end up missing a landing and getting run over or breaking a leg, or something. you'd only have to stay near him and wait for him to fuck up. once he inevitably hurts himself, you win.
