How is this so hard to interpret? Lee's injury occurred before Martin got there....at most, simultaneously. We have a large man blocking upfield expecting some resistance from Lee(who wasn't able to give any). With Lee already twisting, falling down, Martin's progress at that point could not be stopped....hence, the falling over him part. He in no way tried to purposely pancake him. As soon as contact was to be made, they would have both backed off.
Again, Martin is a big boy who can not just stop at will. With Lee not being able to stand his ground, Martin probably was out of control at that point as well and fell over him making it look worse then it was.
My main concern is........it was a rainy and stormy Tuesday. Could possible bad field conditions have a part in this? Bad footing, slipping, etc, etc. It seems the smart thing to do would wait it out and make sure the field is dry....maybe postpone field activities until the next day. I don't know.......