Visible crew/equipment: The Angels are being stalked by a hired killer. He tries to shot Jill in the boys' locker room where shes teaching basketball. He shoots at her and hits a fire extinguisher. You can see the "plug" for the charge on the extinguisher before he shoots and hits it.
Visible crew/equipment: Nearing the end of the show, the angels and Bosley are in the office and Bosley turns left out of the door. A second after he turns, a shadow that is shorter, wider, and very different, comes from the right in the hallway outside the door and walks towards Bosley heading left. Clearly not his shadow.