what a humorous scenario....
An ex-bank employee who can hold his shit in going postal on his coworkers with a hummer mounted minigun. Have the guy wear a diaper, eat metamucil by the bucketload, have cool computer animations of poop coming out of a loose asshole(a la the heart in crank, bullets in romeo must die), jason statham play the character, wayes bros as producers, and you got yourself a summer box office smash hit.