Visible crew/equipment: When Al, Fonzie, and Howard use "Gulper" in the diner's kitchen, it starts to throw salad all over. You can see the same hand twice in a short period throwing salad from the door window. (00:13:40)
Visible crew/equipment: When Don comes into the garage to apply for the job, the T-mark can be seen on the floor by Fonzie's feet.
The Ballad of Joanie and Chachi - S11-E2
Visible crew/equipment: After Chachi walks out of the college classroom, when Joanie takes a seat and starts crying the boom mic dips into view at the top of the screen, in the wideshot.
Visible crew/equipment: When Fonzie and Chachi are wearing their tuxes, Chachi nervously picks up the telephone for no reason, and just as he walks around the table we can see set lighting at the top of the screen, over the window.
Answer: If all the actors and hands know their roles well enough they could perform the play reasonably well even without a director.
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