10 More Movie Mistakes Directors Refused To Fix Because The Acting Was Too Good

Derek Zoolander, the character played by Ben Stiller in the 2001 comedy, is an idiot.

That's his whole deal. He's a male model with, according to the movie's poster, "3% body fat, 1% brain activity". The numbers don't lie.

Stiller managed to incorporate a moment of real-life ditziness into his performance when he forgot a line during filming. During a scene where David Duchovny's character reveals that all male models are actually trained assassins, Zoolander asks "But why male models?"

This, regardless of the fact that he'd just asked that same question a few moments earlier.

Stiller went totally blank and so said the only line of dialogue he could remember. Luckily, it fit the character's dumb-dumb persona to a tee, and everyone else on set just went with it.

We're not sure what the original follow-up line was meant to be, but we're doubtful that it would have been better than what we got. Stiller's comic timing is perfect, which is even more impressive when you consider that his brain was in panic mode whilst he was filming it.

Maybe it was aliens out for revenge on Duchovny.