Continuity mistake: When Jigsaw says "You're already dead on the inside", the oxygen mask is resting on his chest. In the next shot he is holding the mask. (00:25:00)
Continuity mistake: Jeff lays his bloodied hand right in the center of Jigsaw's chest (pointing towards Jigsaw's chin) when he says "I forgive you", but pretty much only his fingertips touch Jigsaw. Right before Jeff slices Jigsaw's neck you can see the handprint, but it's MUCH more defined than it should be AND the fingers are pointing towards the right instead of straight up. (01:42:10)
Continuity mistake: When Jeff is inside the box he kicks out 2 boards, when the shot cuts to the outside there's only one board missing. (00:30:55)
Continuity mistake: When Jeff is screaming at the guy in "The Rack" there are a few spinning shots of "The Rack". You can see that the guy's arms aren't broken, even though you've seen them both be twisted until they snapped. (Slo-mo helps but is NOT required).
Continuity mistake: When Matthews is smashing his foot with the toilet bowl lid, he probably hits his foot a good six or seven times, and one of the times he also glances against the flashlight and it rolls a bit to the side. The next time you see the flashlight it's pointed right back at his foot like it was in the previous shots. (He was still pounding away on his foot, so he didn't stop and realign it or anything.) (00:03:00)
Continuity mistake: In the close-up when Amanda goes to suffocate Adam with the plastic, the plastic only goes up to his forehead, yet when the scene cuts back (instant cut) the plastic is completely surrounding his entire face and head. (01:16:50)
Continuity mistake: The key is bubbling when it first drops in the acid, and continues bubbling throughout most of the scene. As Jigsaw's message is winding down, the bubbling dies down and stops. But it's bubbling full force again when the detective goes to put her hand in the jar. (00:13:20)
Continuity mistake: The acid is completely red after the woman puts in her hand. The acid jar is then completely clear throughout the rest of the scene. (00:16:50)
Continuity mistake: When Amanda says "I'm standing right here" her hair is hanging down, but brushed back from her right eye, in the previous and subsequent shots her hair is hanging down and covering her right eye. She was holding the gun in her right hand the whole time and all the cuts were instant, there was no time to move her hair.
Continuity mistake: The green tube that's connected to Jigsaw is gone when he says "Suffering? You haven't seen anything yet", but it was there in the previous scene and it's back the next time you see him.
Continuity mistake: Lynn explains the procedure she's going to do to Jigsaw, then goes to fill the syringe. Look at the syringe when she sticks it in the bottle, the plunger part is pushed all the way to the bottom. The shot cuts to a different view and the plunger is a good inch or 2 pulled back already (she hadn't started to draw it out yet, you can see 1 or 2 inches of air). The shot cuts again, and now the plunger is at the top of the syringe again, then she starts drawing it out). (01:01:30)
Continuity mistake: When Jigsaw is coughing up blood, the blood in the mask disappears between shots. (00:37:55)
Continuity mistake: Amanda's holding the gun in her right hand in every scene when she's arguing with Jigsaw, except when she's saying "It's all BS," then the gun is in her left hand. It's back in her right hand then very next scene (all instant cuts, no time to switch hands).
Continuity mistake: Kerry's hand is severely burned from the acid, but in all following scenes her hand shows no burns. (00:16:00)
Suggested correction: They do show burns throughout the rest of the scene.
Continuity mistake: Amanda's hair is in a lose ponytail when she sees Jigsaw holding Lynn's hand. A large part of her hair is hanging down the right side of her face and in her eye. She storms out of the room and now all of a sudden her hair is all pulled back in a tight ponytail and no hair is hanging down or behind her ear, it's all back in the ponytail (instant cut, no time for her to re-do her hair).
Continuity mistake: When the tape player says "The key is among your son's possessions" Jeff is standing in front of the opening between the bars leading down to the ladder, and he takes a few steps towards the incinerator (his left). The screen cuts back to Jeff and you can see in the lower left-hand corner of the screen that Jeff is still standing in front of that opening between the bars. (00:56:10)
Continuity mistake: There is a closeup shot of Matthew's foot right before he starts to smash it with the broken piece of the toilet bowl lid. He's placing the flashlight on the floor next to his foot and you can see that the sock is back on his foot, even though he took it off previously (right before he first attempted to saw through his leg). (00:03:20)
Continuity mistake: There is a far-away shot when the first pig comes out. You can see Jeff standing on the platform holding his left hand to his face, there's an instant cut to a close-up of Jeff, but now his right hand is held up to his face. (00:58:45)
Continuity mistake: In the close-up shot of Lynn removing the piece of Jigsaw's skull you can see that she's holding the instrument in her left hand (look at the position of her fingers), but in the farther away shots she has it in her right hand. (further evidenced by later in the scene where you see a close-up and she's still holding the instrument in the left hand and a knife is in her right). (01:04:30)
Continuity mistake: When Jeff is monologuing about how "Everyday for 3 years I wanted to kill him" there is a tear that appears in his right eye and starts to run down his cheek. The shot cuts away for a second, then back to Jeff and there is no tear, not even a wet tear trail.
