From HowDoYouKnowMovie
Usually, you keep the bloopers away from the public and tuck them in at the end of the movie, but the How Do You Know movie featuring Reese Witherspoon, Paul Rudd, Owen WIlson and Jack Nicholson is using the bloopers to advertise itself. Quite effectively, may I say.
Compare that with the movie trailer itself. Which one is most effective and makes you want to go watch it?
From MovieSpawn