He directed live action mahou shoujo too. And the first Animal Crossing movie?!? At the same time he did "Imprint".
I get the feeling he drunkenly rewatches his own movies during the day, gets a phone call and blurts out "Yeah, yeah, I'll do it", and after someone goes to sober him up, he just turns up at the shooting, zero idea what he's shooting, quickly reads the script, gets distracted thinking about his movies and writes some extra scenes up, gives good directions, then goes back to sleep and the process repeats.