Hmm.

[ladybug_archive]

It rather intrigues me how Penguin tries to stop Joker from crashing Dracula's hideout, and then he seems shaken when Dracula turns Joker into a vampire. They're both fairly nasty people and they don't like each other. They only work together occasionally, out of necessity, and it never lasts long. And Joker had been particularly nasty to Penguin earlier in the film, electrocuting him with dangerous joy buzzers after tricking him into shaking on a partnership.

Maybe Penguin just didn't like seeing someone he knew turned into a vampire? Although if it was Batman/Bruce Wayne, he would probably crack up laughing.