Visible crew/equipment: When the O'Grady mob are fighting the Angels, Alex turns off the lights. Just after they flip over the men, you can easily see the harnesses at the top of the screen. (00:54:25)
Visible crew/equipment: When Bosley is a crossing guard and is yelling 'Stop' at the oncoming car, lighting equipment is seen reflected in his glasses. It can also be seen reflected in the cars after the children have crossed. (01:10:40)
Visible crew/equipment: As the Angels are all hanging on the blue car that Madison is driving in the end, you can briefly see the small hook at Lucy's stomach, that was keeping her secure. (01:31:45)
Visible crew/equipment: When the Angels are racing in the "Coal Bowl" we can see a camera on top of the bridge structure. Watch for a wide angle shot and you can see the camera moving at the same speed as the dirt bikes, at the very top of the screen.
Answer: Bill Murray played the character of Bosley and it was no secret in terms of the gossip from the entertainment shows like Extra, Access Hollywood and so on that Bill and Lucy Liu did not get along. From what I heard this was the reason that Bill did not reprise his role in the second film and Bernie Mac took over as Bosley.
Tobin OReilly