Continuity mistake: When fighting the bad guy he takes a full on smash in the face with a knuckle duster yet his face is hardly marked. Maybe all the Superman rumours are true after all? (01:42:30)
Continuity mistake: Memphis skids when seeing the road accident, and it is at a noticeable angle. The camera cuts to the police arriving, then back. And the Shelby GT 500 is now straight for the line up to the stunt that follows. (01:44:10)
Continuity mistake: After Colitri shoots the valve which burns Castlebecks hand, he drops his gun. It can be seen sliding towards the edge Colitri gets pushed over. After Colitri is pushed over, Memphis and Castlebeck stare at each other and Castlebeck retrieves his weapon, it is now only inches from the boiler, not the edge. (01:51:25)
Continuity mistake: After the detective gets the idea of the black light in garage with the old car list, the camera cuts to the garage where they're walking in. You will notice when they walk in that one of them has a black light and the other has a White bulb. It pans down to the debris on the floor and he's now got a black light.
Answer: He sits on his hand until it goes numb, and then masturbates. "Stranger" refers to the fact that it feels like someone else is doing the work for you.
Nick N.