Dive into your creative stream
They weren’t kidding when they said they were on a budget…
"Saw" director James Wan on Leigh Whannell playing every character in the pick-up shots:
"There's a great shot in the film where Detective Sing walks through the door with his shotgun up in front of him. In the widescreen version his head's actually cropped so you don't actually see the face. But in the full frame one the crop has been removed so you can actually see Leigh's face coming in through the doorway. It's like, 'Guys, we shouldn't be doing this.' [Laughs] 'It's a completely different actor, what's going on here? The guy from the bathroom's now a cop?'"
Source