... the Joker has done. What just made you go O...M...G... or laugh your a$$ off or whatever.

Breaking his own spine.

• On Christmas eve where he kidnapped Robin and Drove around running over anyone in his way. I laughed at the end where he's about to get hit by a truck. " This would be funny if it was happening to someone else..... Oh what the hell I can take a joke."
• In Long Halloween during a fight with Batman on New Year's Eve.

• In the Joker where he and Harley take one of his partners in the backroom of his strip club and skin him alive.
  

shooting batgirl crippling her, kidnapping her, taking unclothed pictures of her and making Commissioner Gordon see the pictures. Gordon almost kills him but instead shoots him in the legs. Joker starts laughing as he says he "get's the joke". 

"shooting batgirl crippling her, kidnapping her, taking unclothed pictures of her and making Commissioner Gordon see the pictures. Gordon almost kills him but instead shoots him in the legs. Joker starts laughing as he says he "get's the joke".  "

Lesse, there was the time he tied Lex Luthor to a wrack & tortured him after wiping out his entire secret service or whatever the hell they were.

There was the time he threw a fit when Azrael showed up & then made him crawl into a pipe.

There was the time he kicked that steroid freak's ass in prison.

There was the time he kidnapped Robin & then shot a barista's manager at a drive-thru coffee shop.

There was the time he snapped a guy's neck & latter slit his tongue with a barber knife.

There was the time when he was covered in pigeons he'd trained.

There was the time when he strung a bunch of people off a building & shot at them.

There was the time he busted into a postal office & demanded that his face be put on stamps.

There was the time when he picked up Barbara Gordon's wheel chair & chucked her down the stairs.

There was the time when the Joker really did get the last laugh after Batman accidently stabbed Jason Todd with a batterang.

There was the time he shot Poison Ivy while she was dressed as Harley.

There was the time he tried to slit Harley's throat.

There was the time he was wearing pink & had Batgirl stapped to a wheel while he chucked knives at her.

There was the time he grabbed Batman's ass. (If I can only pick one, this is it).

There was the time when he was playing cards with the corpses of 3 Robins.

Almost every thing he does makes me laugh or omg.