uh...if cunningham didn't commit a personal foul then ninkovich certainoy did by going helmet to helmet. he came in awful high and hit sanchez's helmet with his.
Except it wasn't. Watch the play again. You'll see that not only did Cunningham have a hold on his leg when he fell, but Ninovich never even TOUCHED Sanchez in the helmet, much less hit him helmet to helmet as you say. No foul in either case.