Visible crew/equipment: In the beginning when Mr. White brings Mr. Orange to the warehouse, watch the background as Mr. White opens the door of the warehouse. A trailer and a crew member is visible who then walks behind the trailer. (00:11:20)
Visible crew/equipment: When Mr White gets out of his car after it crashes to shoot the cops coming in their patrol car, keep an eye on the rear passenger window of his car where a boom mike can be seen. (01:13:10)
Visible crew/equipment: The boom mike's shadow is visible when Joe gives out names. It is easily seen moved to the left when he says "let's go to work!" (01:19:25)
Visible crew/equipment: The camera crew and the boom mic operator can be seen reflected in the store windows as Mr. Pink is running from the cops.
Visible crew/equipment: When Mr. White and Mr. Orange run away after Mr. Brown's death and killing the cops, crew members are visible in the background hidden behind the truck.
Visible crew/equipment: When Mr. Pink escapes from the cops and he's hit by a car, you can see the crew members in the background watching the scene.
Answer: It's a way of lighting a zippo lighter. If you snap your fingers close to it, your middle finger will strike the wheel and light it.
Nick N.