Batman Returns
Batman Returns mistake picture

Continuity mistake: Just before Batman takes his mask off at the end, the black makeup around his eyes vanishes while the mask is still on. (01:48:20)

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Selina Kyle: Ok, Intimidate me, bully me if it makes you feel big. I mean it's not like you can just kill me...
Max Shreck: Actually, it's a lot like that.

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Answer: It isn't. If you look at when he dies you will see that he has cuts on his face that are bleeding red. The blue liquid is more like a bile, probably similar to saliva.

What about when he emerges from the water and green blood comes out of his nose and then his mouth?

As the answer says, it's most likely bile or some other bodily fluid, not blood that we see flowing from his nose and mouth.

TedStixon

Chosen answer: It is part of the mutation that caused his peculiar appearance.

MasterOfAll

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