Or the Jack Riewoldt studs in the back speccie.
Don't hurt me Tigers fans...
The comparisons to marks are such a "worst case scenario" on something like this.
In the Duncan case look (see images below) at where he launched from and where he landed (past Hall after collecting him). He didn't just jump 'up'.
re marking contests - - there's a lot of freedom there; they've given up paying the push off the shoulders with the hands.Certainly the studs up is dangerous and should be penalised.
Raised knees are outlawed in Supers/Masters footy. I can understand why but never a great fan of it.