Since someone posted on FB that the first episode aired this day 33 years ago. I’m guessing that in CS you can start a dedicated thread. If you were to ask at GQ, you’ll have to start a new thread for every questionable scene. So, what particular move by Mac just wouldn’t work in the real world?
The first that comes to mind is fixing a perforated radiator by cracking several fresh eggs into the filler mouth. He said it will work, assuming the leaks aren’t too big. My take is that the cooked eggs will just clog the radiator and foul the engine.