Visible crew/equipment: As Henry is walking down the stairs to the bank vault, the camera's shadow is visible on the side of the staircase. (00:09:45)
Visible crew/equipment: As Ferris is standing in front of the bakery, you can see the reflection of several crew members in the window. You can also see the reflection of another crew member on the glass inside the phone booth.
The Four of Us are Dying - S1-E13
Visible crew/equipment: As Arch Hammer is walking to Hotel Real, the camera is looking up towards him as he walks. Just before he turns to go in, the lights, roof, and support beams of the soundstage are above the skyline backdrop.
Visible crew/equipment: Right after the phone conversation, everybody starts going towards the door. As they do, if you look at the couch on left you can very briefly see a shadow of something moving across it. It couldn't be any of the actors since they were all either outside or on the other side of couch.
Answer: It's explained in the episode. The aliens are experimenting to see how humans react to various scenarios. This just happens to involve them using super strength.
Thanks. It's been a long time since I saw the episode so I forgot.