I did a spell as a blippy before becoming an ATCO, and here's one of my favourites from the sim....
My sim partner on ADC emergency runs with me this day was a locally recruited chap with zero experience of aviation.
Run #1 passed off ok, subject aircraft was a B737-200 with a single engine failure. The student requested POB, and my partner hissed at me "What shall I say???" "100," I hissed back. The run finished.
Run #2, same scenario, subject a/c this time was a JS31. Student requested POB, my sim partner confidently and loudly reported "100!"
Amidst the hysterical laughter, a strangled cry of "Clocks off!" emanated from the instructor.
The poor guy had no idea.....