Visible crew/equipment: In the sequence where The Narrator is explaining about Tyler's projectionist job, a boom mike is visible at the upper left hand side of the screen, before Tyler explains about the cigarette burns.
Visible crew/equipment: During the police interrogation The Narrator is pinned to the table, after he gets the gun and rolls back off the table you can easily see the power pack attached to his back/underpants during the roll. (01:58:10)
Visible crew/equipment: Tyler and the narrator are walking to the house for the first time. This shot tracks along the road. The camera track can be seen on the road (metal pipes), and the camera stops where you'd expect the end of the track to be.
Answer: After he realized Tyler's true nature at the hotel, Tyler made many phone calls. Jack called the same phone numbers and realized that they corresponded to the buildings mentioned on the Project Mayhem folders. He had to confirm this, so he called a couple different buildings. He tried to tell the building operators that something was up, but they're already assisting Project Mayhem and could not be dissuaded. In desperation Jack went to the police...
Phoenix