Calum Clark hyper extended the other players elbow it is completly different, hence why he got 29 weeks and Healy got 3 weeks. Jerry Gusscot played it down this is what he said on the BBC website
Hi Tresamble/Tommo, neither myself nor Keith were attempting to justify the
stamping by Healy, merely saying what a fine line it can sometimes be - you
could easily interpret that as condoning it, but that is something I would never
knowingly do.
In slow motion the action is enhanced and looks a lot worse, when you watch
it in real time you could easily have missed it. Cole was guilty of bringing the
driving maul down and fell lazily on the wrong side, impeding scrum-half Conor
Murray as he tried to get the ball away.
Did Healy lose his head yes, did he mean to cause injury to Dan Cole, no. Did Cole deserve a yellow yes.