It looks like your just not getting enough time. Try to get a little more air or straighten your legs out quicker, not sooner but try to get your legs out and ready to land quicker than you do now unless you can get more air. You might even want to straighten out the end of your cork a little more so it's easier to land. That looks really sweet though.
Im all for having fun, showing your tits and getting fucked up on a river float but it can be done without being a pig.