proven is this:
http://www.patsfans.com/new-england-patriots/messageboard/10/291477-pat-chungs-clean-hit-henne.html
and this:
YouTube - Patriots roughing the passer penalty on Chad Henne
the only good view is the last one...from behind henne
u can see that the way chung grabs hold of henne, his upper body is NOT moving...and it is not sliding over hennes, but rigid at one spot
now that we have established that, look at AFTER burgress hits henne, henne's helmet goes forward and goes forward a GOOD amount....and STILL does not touch chung....
unless chung can somehow change his momentum mid air, he CANNOT move backwards after hitting henne, and therefore when burgress hit henne, hennes helmet would have NO ROOM to move forward, cuz chungs "crown" would be there
^^^^=proof