If you head over to the IMDb, look up Roger Corman, and start scrolling through his filmography, make sure your scrolling finger is limbered up. The list of producing credits alone stretches, as of this writing, to 398. And Corman, well into his 80s now, is still consistently averaging two to three movies a year. Many of those aren’t just putting-up-the-money executive producer credits, either. Corman, as Alex Stapleton’s documentary Corman’s World demonstrates in its opening minutes, is a hands-on producer, offering directorial input onset (keep scrolling down the page and you’ll find over 50 directorial credits from 1955-1990), and sitting with the editor and guiding the cutting process.