Visible crew/equipment: When Clark finds Lex in the Luthor mansion, they walk down the hall and into a new room. As they enter, as Lex is saying "So, hows the new ride?" if you look in the bottom left of the screen you can see a white tape marker on the floor, where Lex will walk over to subsequently. (00:33:10)
Visible crew/equipment: In the episode, "Anomaly," at the beginning, when Phlox is looking at his animal cages, you can see a string or wire attached to one of them, presumably the means by which the cages are shaking.
Visible crew/equipment: At the dance club when Caleb Mathias holds Emma, Brennan comes to the rescue with a few swift airborne kicks. During one particularly high kick, the lines attached to Brennan are in perfect view above him.
Visible crew/equipment: When the Lone Gunmen return to their van after meeting Jimmy, when Langly opens the driver's side door, you can see the reflection of two crewmembers' feet in the rear view mirror. (00:24:20)