Joker, Robin and others in “Unfinished Business”

Joker

Let bygones be bygones. I'd like to shake hands with both of you. Can't we be friends?

Robin

I'd rather shake hands with a spitting cobra!

Batman

You're being cynical, Robin. To err is human, to forgive...divine.

Batman

[After being buzzed by Joker while shaking hands] Another...practical joke, Joker.

Joker

Not exactly Batman, it's my deadly joker buzzer, one by one your five senses will leave you. Then your lungs will collapse, and certainly you'll be KAPUT, FINI, DEFUNCT!