I find it funny that Joker's already pointed out the fact that this sort of thing is a bad idea. I think it was in the Brave and the Bold...
Harley: "Ain't you gonna take his mask off and see who he is?"
Joker: "And reduce my primal enemy to a mere man? Harley, my dear, I'm so disappointed in you. Where's the fun in that?
He then breaks into a song and dance number utilizing the nigh-omnipotent powers he's recently got his hands on. I loved that show...
Harley: "Ain't you gonna take his mask off and see who he is?"
Joker: "And reduce my primal enemy to a mere man? Harley, my dear, I'm so disappointed in you. Where's the fun in that?
He then breaks into a song and dance number utilizing the nigh-omnipotent powers he's recently got his hands on. I loved that show...