When I write screenplays, I see the movies in my head and to inspire me to get to "The End", I'll step away from the words and do some art to help me keep going. During my 50 some odd drafts of the film Constantine for Warner Bros. I did this piece of crude animation just to get the tone of the story solidified. I showed it to Warners and they liked it enough to stick it on the DVD as a secret Easter Egg. Ironically most of the scenes in this didn't make it to the final draft.