Other mistake: The drip-meter that is supposed to administer Jigsaw's medication is not turned on. Anyone who has spent time in a hospital and seen one for real knows that a lot of numbers are shown on the displays when it is running to show medication status. (00:13:50)
Suggested correction: It's not specifically stated that the machine is in use. That's just an assumption. It could be set dressing he's using to enhance the perception of his condition.
Other mistake: In the crematorium trap, near the end of the scene where the doomed character dies, his jeans should be entirely burnt due to the flames, yet they are not. This was corrected however i have personally tested it. For the amount of time that this character was in flames his jeans would have turned black from the soot created when jeans burn. Test it yourself. (00:38:10)
