In 1962, his studio produced and syndicated 100 new Out Of the Inkwell cartoons, based on the Koko the Clown character, originally created by Fleischer Studios.
Insane Clown Posse | Bozo the Clown | Koko Taylor | clown | Krusty the Clown | Koko the Clown | Koko B. Ware | Koko | International Clown Hall of Fame | Shakes the Clown | Koko (venue) | Koko Head | Emperor Kōkō | Clown | Cathy's Clown | Tommy the Clown | The Clown | Shawn "Clown" Crahan | rodeo clown | Obnoxio the Clown | Laugh, Clown, Laugh | Koko Tsurumi | Koko River, Rutsiro District | Koko River, Rusizi District | Koko Komégné, ''Nje Mo Ye'', Douala, 2007 | Koko (gorilla) | Koko ga Hen da yo Nihonjin | Koko: A Talking Gorilla | George Brown, Class Clown | ''Dracaena cinnabari'' in the Koko Crater Botanical Garden |
"I Was Killing When Killing Wasn't Cool" was the first of Columbia's comics to conspicuously show the influence of the animated cartoons of Fleischer Studios, particularly the Out of the Inkwell series with Koko the Clown and "dark" cartoons such as Bimbo's Initiation.