scott adkins does his stunts using ropes and stuffs.. he can't do live gravity-defying moves like Tony Jaa, I think much of credit goes to his extremely light feather-weight which he can propel on his wish through his martial art moves. It's really hard for well-built scott adkins to perform such maneuver with that level of intensity like Tony Jaa does. Weight is to blame in adkins case but his movies are still great to watch :D.. he's sort of next vandamme, unsung budding martial artist cum actor :D