In the fight scene between the Joker and Batman, Batman really wales on
the Joker and bloodies his mouth quite a bit, especially around the chin.
BUT (and that's a pretty big BUT!!! (-:), when they show the Joker after he
falls to the ground, the blood is conspicuously absent from his chin, and there
are scratch marks on his left cheek that weren't there before. I really doubt
he got the scratch marks from the fall, due to the orientation of the body,
and as Tom had pointed out in his message, the continuity of the film up to
that point was pretty good....
As Arte Johnson once said, "Velly interesting!!!"