Visible crew/equipment: During the Corvette scene when Arnold is driving, there is a shot looking at Bill Paxton talking and on his shoulder is the shadow of the boom mike. (00:55:10)
Visible crew/equipment: In the scene where Bill Paxton and Arnold are riding in the Corvette, you can see a camera reflected in the windshield on several occasions; most notably just after Arnold takes the wheel. (00:55:15)
Visible crew/equipment: When Helen tells Harry she slept with the plumber and he kisses her goodbye, watch the reflection on her glasses: When Harry walks out to the right, a crew member standing in front is very noticeable.
Visible crew/equipment: The first time we see Salim Abu Aziz on the Florida island, he has his back to the camera and turns around. The shot comes closer to him. The camera shadow becomes visible on him at that time.
Visible crew/equipment: When Harry seats in the Harrier a pilot wearing sunglasses stares at him and stage lights are reflected on his lenses.
Visible crew/equipment: After Harry finds out Helen is cheating on him with Simon, there is a scene at the house where the camera pulls in on the family eating dinner. In this shot the shadow of the camera can be seen creeping onto the windowsill.
Chosen answer: He didn't really. Harry just knew he was heading up. He pressed the top floor to get the elevator moving and kept an eye on him on the way up. If the terrorist's elevator suddenly stops, Harry can press the button for that floor to stop his elevator.
XIII