Question: When John comes into Will's office, he explains that he wants to try an experimental procedure to help cure his cancer. It also has a very high success. But Mr. Easton denies him, claiming the cost would be substantial. He crumples up the paper and throws it away like he has run out of choices. Since John is a very wealthy man, why doesn't he just pay for it himself?
Question: What would happen if William would stand on the other side of the cage? Then needles wouldn't stuck into him. Needles would hit the cage and start sprinkle acid in direction of mother and son, most likely hurting them. We learn from previous movies that Jigsaw planned his traps very carefully ,so he wouldn't allow that mother and son would hurt in any case.
Question: Why did William cover the healthy people but did not cover the sick people?
Question: Here's an interesting thought; Debbie was provided with a small power saw and told that to prevent a pipe piercing her skull, she would have to get a key, which is revealed to be in William's side. What was to stop her from simply using the saw to cut off the spear on her chest? Couldn't she have cut it off her chest, and had the harness taken off later?
Question: In the beginning scene where the two participants had to cut flesh in order to survive, what was to stop them simply putting other stuff on the scales instead of flesh, such as the heavy tools and knives and escaping that way?