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Trivia
During the opening scene Jigsaw shows the head-trap victim where the key is. Jigsaw is seen leaning over a table with the victim lying unconscious on it. This wasn't actually the actor who played Jigsaw; it was a cameo appearance from director Darren Lynn Bousman. See more...
Continuity: In the scene when Eric Mathew's goes to confront Jigsaw (after he first looks at the monitors), the chain of his badge gets twisted when he gets held back, but as he's about to leave the chain appears, untwisted. But when he gets back to the monitors, his chain is twisted only to be untwisted by him a few seconds later.
Continuity: In the part right before the girl is thrown in the heroine needle pit, Jonas takes the envelope with the drug dealers tape. When the cop's son pulls the cover off the pit, you can see that the envelope that Jonas just ripped off is still on. It's right near the bottom of the screen, and in the middle.
Continuity: When Emmanuelle Vaugier walks into the room with the clear box trap hanging from the ceiling, in the middle of the two hand openings is a syringe with the antidote. It is filled with significantly more in the close up shots, than there is in the full shots which show a lot less in the syringe.
Revealing: When Amanda is slowly getting up right after being thrown into the needle pit, if you watch very closely, in one or two quick shots you can see a small pad on the actress' back used to hold the needles in place. Slow motion helps, but is NOT required. (Seen in Uncut version, though it may be in the theatrical version as well.)
Continuity: In the very beginning of Saw 2 when the informant awakes and realizes where he is and suddenly gets up from the chair there is a brief shot of him from the rear. If you look closely the leather waistband for the trap is completely loose, but when the camera quickly switches to his front, it shows the leather waist band tight around his waist.






