Originally posted by systemshock2What comic dude, it sounds tight
There was actually a comic from a few years that chronicled this. Basically Joker had poisoned Lois, and from there Superman went to Batman for help. The two of them went to Arkham's insane asylum to meet the confined Joker, and Joker explained to them that he has a cure for the poison, but it would involve Superman having to inject Joker with some potion that'll create the cure inside Joker. The only catch is that the process will kill Joker.You see even Joker himself realized that he could of course never physically defeat Superman, so he had to get into Superman's mind and heart in order to do so.
Throughout the issue Superman argued with Batman about injecting Joker with the cure, to the point that as the Joker expectantly waits with the needle Superman grabs a defending Batman by the neck and yells at him to get him out of the way. But Batman keeps telling him that that is what Joker would want, to effectively defeat all that Superman stands for and having the Joker win posthumously.
Finally Superman relents, and back at the hospital they essentially watch Lois die from the poison. But a few seconds later her heart suddenly restarts, and Lois returns to normal health. It seems that Joker had purposely made the poison to only be temporary. Batman comments to Superman that if he would've gone through with killing the Joker in order to get the antidote, it would've been the cruelest joke ever to realize he would've killed Joker all for nothing. Joker knew this action would've probably made Superman go insane again, like when he killed those Phantom zone characters, making Joker the true winner.
So essentially Joker almost beat Superman, not physically but mentally. Btw a really great line is at the end:
Superman: You mean to tell me Joker would've killed himself all for a joke. But that's-
Batman: -insane. Tell me about it.