Visible crew/equipment: As the motorbike falls from the highway, just after it explodes there's a very short wide shot of the site with Danny Glover standing by his car and a couple of guys in hard hats standing around (or running for their life). If you look right behind Danny Glover you can see two people, one in a white hat, one in a red, and one of them is holding a camera - they start moving backwards just before the end of the shot. We then see the bike blowing up, then a close up shot of Danny Glover, from the camera we've just seen. (01:30:25)
Visible crew/equipment: 4 filming or equipment transport trucks can be briefly spotted on the highway above the accident in the chase scene. (01:32:36)
Visible crew/equipment: When Leo pulls up with the folks looking at Murtagh's house, film lights are reflected in both vehicles. They look very out of place.
Visible crew/equipment: When Riggs and Murtaugh go to see Billy, who has just been murdered, the camera and its operator are reflected in the interrogation room door.
Visible crew/equipment: As Riggs and Murtaugh start shooting at the construction site, a shadow of camera equipment can be seen on the pile of wood they are hiding behind.
Visible crew/equipment: Leo pulls up to the construction site and gets out of his vehicle. During this entire sequence, you can see a very obvious film light with a diffuser reflected in the driver's side of his red car.
Visible crew/equipment: Leo is arguing with Riggs and Murtaugh at the construction site about shooting out his tires. The camera pans over to see them leaving in their cruiser. The camera crew's feet can be seen in the bumper.
Visible crew/equipment: The first angle of the building exploding is from high up, looking down on the scene. There is a visible crane with a camera on it in the bottom left of this brief angle.
Visible crew/equipment: The camera crew is visible in the bed of Jack's truck as it exits the unfinished freeway and barrels through cones and other construction equipment. (01:36:40)
Visible crew/equipment: Right after Riggs saves Rianne's job, he and Murtaugh are driving in Rigg's vehicle. There is a shot looking through the driver's side window. Pay close attention to the reflection the truck makes in the glass on the buildings, you can see the crew and at least two cameras shooting the shot from a rig.
Answer: She didn't want him to see that she was a fan of those comical idiots. She was supposed to be a tough nonsense internal affairs officer. She was in fact his soulmate, exactly like him, wild and crazy.