Visible crew/equipment: While Roy is hanging off the side of the building with the second victim, Johnny's trying to tie off the swaying sign, then after he asks for some slack the second time, there's an overhead shot from the roof, and we can see the shadow of the camera and a bit of a crew member, at the bottom of the screen. Then a few shots later, from the same POV, we still see the camera's shadow, and we also see the leg of a crew member (white sneaker and dark pants) walk into the shot and back out, at the left of the screen.
Heavyweight - S3-E5
Visible crew/equipment: When Roy and Johnny are with the man who was injured by a gunshot, Johnny goes across the street to treat the stabbing victim, and just as Johnny and the others enter the living room, the shadow of the moving boom is visible on the wall to the right.
It's How You Play the Game - S4-E19
Visible crew/equipment: At the scene of the traffic accident, when the injured driver starts shouting just before they load the stretcher onto the ambulance, a ducking crew member's head dips into view at the bottom, right corner of the screen.
It's How You Play the Game - S4-E19
Visible crew/equipment: After John is punched in the nose at the scene of the traffic accident, when the ambulance arrives the reflection of set lighting is visible on the surface of the ambulance.
Visible crew/equipment: After Station 51 is dispatched to the plane in trouble, just as Engine 51 makes the right turn into the lot, before they park beside the squad, a crew member's/cameraman's sleeve gets into the shot, at the left of the screen.
Visible crew/equipment: When Johnny and Roy are at the top of the open drawbridge, beside the car hanging over the edge, just after Roy says "Be careful, this could go at any minute," the moving shadows of the cameraman and another crew member are visible on the bridge surface. That shadow is visible in two other previous shots from the same angle.
Visible crew/equipment: After Station 51 is dispatched to the bomb threat, when the squad and engine pull into the alley, just as Roy stops the squad, the reflection of the cameraman/camera are visible in the spotlight's chrome surface.
Visible crew/equipment: When Station 51 is dispatched to a man trapped at World Picture Studios, just after they pass the studio's gate, in the moving shot from the left side of Squad 51, the reflection of the cameraman is visible on the lightbar atop the squad's roof.
Visible crew/equipment: After the fake eye exam 51's guys are sitting around the kitchen table, and when Chet tells them that he was sitting in the front row at the movies, there are moving shadows at the bottom, right corner of the screen, which do not belong to the guys.
Visible crew/equipment: When Roy and Johnny enter stage 3 to search for both Vic and the bear, just after Johnny and Roy split up, as the camera moves forward in Johnny's direction, the moving shadow of the cameraman/camera are visible on the filing drawers, to the left.
Visible crew/equipment: After Squad 51 is dispatched to a man injured at the movie studio, just as they reach the studio, in the shot from the back of the squad, the reflection of cameraman is visible on the lightbar atop the squad.
Visible crew/equipment: When Station 51 is dispatched to a vehicle accident in the canyon, en route there's a shot from the POV of the top of Engine 51, with the dome light in front of the camera, and the reflection of the covered camera, which is mounted on the engine's roof, is visible in the dome light's chrome surface.
Transition - S4-E15
Visible crew/equipment: At the start of the episode, when Captain Stanley leans over to hang up the telephone and walks out of his office, the outlines of the lavalier mic transmitter and wire are visible on the back, left side of his shirt.
Visible crew/equipment: When John and Roy help the driver out of the overturned armored truck, the bulging outline of the mic transmitter is visible on the left side of the driver's shirt, and when Roy's arm is around the man's waist, Roy even puts his palm over the mic transmitter as he bends to pickup the man's gun.
Propinquity - S3-E20
Visible crew/equipment: When the ambulance that Roy is riding in is involved in a traffic accident, the ambulance driver, Hal, comes out to help, and the outline of the mic transmitter is visible on the back of Hal's white shirt.
Visible crew/equipment: Just before the hermit leaves Rampart, the actor's mark is visible on the floor in front of the market owner's feet, and when Dixie turns the hermit's wheelchair, the tape mark in front of Brackett becomes visible.
Visible crew/equipment: When John and Roy get back to the station, Captain Stanley asks them to step into the office, and as Cap walks through the doorway the camera's shadow is visible on the wall at the left. Also note the coiled electrical wire lying on the floor in front of the squad, and the shadow of something that is directly in front of the squad, even though the squad just rolled in.
Visible crew/equipment: After Station 51 is dispatched to the bulldozer accident, just before Engine 51 comes to a stop at the junkyard there's a shot from the perspective of Engine 51's roof, with the Beacon Ray dome light in front, and on the light's red and chrome surface we can see the reflection of the camera mounted on the roof behind the dome light.
How Green Was My Thumb? - S3-E17
Visible crew/equipment: When John and Roy are searching for the missing man during the fire at the winery, a flaming piece of debris falls in front of Roy. When Roy climbs up to the deck above him, it cuts to Roy on his knees about to stand up, and we can see someone moving right near him, at the left of the screen, even though he's alone.
Visible crew/equipment: After the boy who ingested the ant poison is loaded onto the ambulance, when the back doors are shut, the reflection of the location set lighting is visible in the ambulance window and on its surface.
Answer: It is standard practice to wet down driveways so that they stand out in a long shot.
stiiggy