Cute Poison - S1-E4
Visible crew/equipment: When Sucre is on the phone, a boom is reflected in the phone. (00:13:30)
Riots, Drills and the Devil: Part 2 - S1-E7
Visible crew/equipment: When the air hostess is saying they are making their final approach in to DC, a camera shadow can be seen moving over the seats as the camera pans. (00:09:00)
Riots, Drills and the Devil: Part 2 - S1-E7
Visible crew/equipment: In Riots, Drills and the Devil Part 2, when LJ's mom turns off the TV, the camera man's image can be seen in the glass next to the television. (00:18:20)
The Old Head - S1-E8
Visible crew/equipment: When Kellerman is in the car speaking to Vice President Reynolds, a light screen and equipment is reflected in his glasses. (00:09:30)
And Then There Were 7 - S1-E11
Visible crew/equipment: When Michael goes towards The Key carded room, a stage light is briefly reflected in the glass panel of the door. (00:11:40)
And Then There Were 7 - S1-E11
Visible crew/equipment: Cherry pickers and lights are visible in front of the main entrance. (00:31:59)
Odd Man Out - S1-E12
Visible crew/equipment: When C-note's associates get back in their truck a stage light and equipment is reflected in the paintwork. (00:38:00)
Visible crew/equipment: As the helicopter takes off at the start, the filming equipment is reflected. (00:02:00)
Answer: Because of coincidence.