JWH did exactly this to Sam Kasiano twice in a trial match last season
JWH does it all the time. The pundits haven't picked up on it though.
Storm fans will tell you, he almost broke Jaiman Lowes leg/ankle/knee earlier in the season with a f**king ridiculous low tackle.
The problem is what he does isn't illegal, it's not a stationary ankle twist like what Luke did. JWH comes in at speed to make a legit tackle, he comes down the legs and barrel rolls while holding peoples legs, twisting them the wrong way round.
Keep an eye out for it in 2012. You think at first glance he's just making form, low tackles, but there's something more to his technique. I'm not sure it's malicious but he's probably got the most dangerous technique in the NRL.