What a bunch of bull
Anyone that plays contact sports, knows that it is gonna hurt like fuck, but it isn't going to kill you... it may feel like it... but it ain't
I saw a guy skate full on into the boards, his hockey stick got jammed in a small opening an he ended up with the wrong end of his stick full force into you-know-where
sure he had a cup, but that is gotta be more than 25 times the force of someone kneeing you..