The Judge's mallet falls and breaks after he attacks Killer Croc, but is intact again when Batman examines it in the Batcave.
Right after the Judge says, May heaven have mercy on your souls, Two-Face. Both of them", Two=Face's "halves" have flipped. His good half is on his left side, while his bad half is on his right side.
A poster of Killer Croc in his sewer hideout misspells his name as "Killer Crock".