I've started movies without screenplays both on 'Clash' and...

I've started movies without screenplays both on 'Clash' and on 'Hulk,' and that is tremendously stressful because you have a tendency to overcompensate with effects. You haven't tested it in your head. You didn't run it over and over again and covered all of the plot holes and figure it out. It's a marathon that you sprint.