Acting can be quite a dangerous job and these celebs almost found out this the hard way.
From Johnny Depp falling of a horse and being dragged 25 yards while filming for "The Lone Ranger" to an actor being stabbed by a real knife while filming an episode in "lost".
These Hollywood scenes could have had drastic effects and casualties had they not been more careful.
Browse through the gallery to view more accidents on set. Images via Izismile.