Continuity mistake: When we see the garage trap we see that half the windscreen is smashed away and the other side has a crack through it. However in one shot, the cracks have gone. (00:19:10)
Continuity mistake: When Nina dies, Bobby has her blood all over his face. When he picks his book up a few seconds later the blood is gone. (00:41:00)
Revealing mistake: If you look very carefully when Gibson is machine gunned down, you can see the blood packs in his jacket. Slow-Mo may help but is not essential. (01:07:15)
Continuity mistake: As Evan is tearing himself away from the car seat, you can see his back muscles are a fleshy-color and only have a little bit of blood on them. When he crashes at the end of the scene, his back muscles are suddenly dark-red and saturated with blood, despite looking totally different just seconds before. (00:20:25)
Continuity mistake: At the end of Saw VI, Hoffman has got a massive chunk of cheek missing from the reverse bear trap. However in this film, which continues from Saw VI, he has not got a chunk missing. (00:09:00)
Answer: He, his wife and his daughter were abducted before he decided to work with Jigsaw. He didn't put them in danger. As for why he decided to work with Jigsaw following his ordeal, like other characters in the franchise, he either developed a level of Stockholm syndrome or he concluded that Jigsaw's methods were right, or a combination of both.
Phaneron ★