I can - well sort of! Chile vs Brazil WC qualifier I think it was, chilian goalkeeper, had a razor blade behind the goal, when a flare came onto the pitch and chile 3-0 down he grabbed the blade and cut his own face game abandoned for a replay...then they got rumbled! Or something along those lines...
...in general though, football nowadays is played in the majority by a bunch of girls blouses, to the point you can't tackle anymore. All this fake limping after a tackle, which they shake off seconds later, slight elbows into the face that raise a minor bruise that require five minutes of treatment - drives me mad.
Not defending rugby though, downright nasty the way they inflict injuries, gouging!!!!!