And that was a Tina Fey project too.

Yep.

He painted it for his daughters a few years before he watched "It's the Great Pumpkin, Charlie Brown" with them in '66. Their shared dissatisfaction with the short inspired him to write his own Halloween special, with the imagery of this painting serving as the basis for his story.

While animator Chuck Jones loved the idea... MGM shuttered their animation department soon after agreeing to produce it. So in '72, Bradbury turned the script into a popular novella. That was finally adapted into animation by Hanna-Barbera in 1993.

CATO, YOU FOOL!

Tries to scare people shouting LOUD NOISES!

Also Silverhawks

They implied it leads to permenant insanity if not immediately treated (as was the case when Alfred was infected by it on April Fool's Day).

As opposed to simply dying of exhaustion due to the laughing.

Ya know, if the Gotham PD went after the actual villains with the same ferocity they do Batman in this episode (or whenever he's wrongfully accused like in "Mask of the Phantasm" or "On Leather Wings")... they wouldn't need a Batman.

In the early seasons that aired of FoxKids, it only made them laugh non-stop (they weren't allowed to show corpses). Then the 4th season on WBKids and the film Mask of the Phantasm actually showed his Joker gas killing people.

And it loved having non-human characters to fight (robots, plant monsters, ventriloquist dummies)... because then the writers could come up with horrifically graphic ways to eliminate them that the censors wouldn't allow if they were human.

Because his father was the Nazi and avidly collected them. So he burned his dad's paintings and buys up the rest that Hitler made.

They're gutting Cartoon Network. No need to market it.