Continuity mistake: After Leo makes his "heartfelt confession" to Mick and Mick says he wasn't listening, the glass skull on the desk moves position between shots without either of them touching it.
Visible crew/equipment: After Jax cuts the rope that's supposedly keeping the trap in the air, as Marty falls to the ground you can see the cable that is actually holding the whole contraption up while the rope falls a bit to the right.
Chosen answer: Black Canary, Spartan, Wild Dog, and Ragman.