Moral Event Horizon:
- The Origami Killer may have an understandable motivation, and has grown up with a troubled past. But at the end, when Ethan has succeeded in all his trials and found his son, and it appears that Shelby intends on shooting him and leaving Shaun to die anyway, all bets are off.
- The above is one possible scenario. In another, Scott allows Ethan to save his son and offers to let himself be shot. His manipulation of Lauren certainly counts.
Lauren: "You killed my son, Scott. Were you thinking about that when you held me in your arms?"
- Lt. Blake has two potential moments: beating Ethan up to know if he's the Origami Killer, and ordering his death.
- Kramer wanting to protect his son at any cost may be somewhat understandable; his completely unwarranted comments about Lauren (if she died) being a whore and the victim being "street trash" (said just as Shelby is walking away) almost seem designed as an invocation of this trope.