John Hughes, the director, originally wanted John Cusak to play Judd Nelson's bad boy role. He finally gave in when he realized that John didn't look "tough enough". See more...
Popular blog posts:
Other great sites
Continuity: The scene where Bender and Vernon are in the closet, Vernon tells John to take a swing at him and points to his chin. Now in the frontal view he is pointing to his chin with his right hand, but from the back view it shows him pointing with his left hand, then it goes back to the front with him pointing with his right.