These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Beat The Clock
Nightmare Fuel: When the animated "Hickory, Dickory, Dock" opening was introduced on December 20, 1952, the animation was followed by shots of people laughing against a dark background. Viewers found it unnerving, and the animated sequence was lengthened beginning on February 14, 1953.
The first episodes of the Narz version did not have the chosen letter duplicated under the card. Once, a couple chose the "L" and the board subsequently read "BEAT THE C_OCK" (hey, it could've been "BE_T THE C_OCK" or "BE__ THE C_OCK"). That is why there were duplicate letters under each card.
December 1979: The Clock "breaks"!
Monty Hall: According to our Clock, we have all day.
Mary Ann Mobley: That Clock knows how difficult this [stunt] is!
Monty (as the Clock fixes itself): Alright, now if the Clock will get out of the ad-libbing business [and] let it leave it to the kids...
Memetic Mutation: The British version gave rise to the risqué slang "Beat the clock", referring to an attempt to complete A Date with Rosie Palms before the five free minutes at the start of the porn film end.
The switch to all-celebrities on the Hall version, a mere two months into its four-and-a-half month run.
The PAX version used a digital Clock for most of its stunts (the Whirlwind had a more physical Clock), threw out a lot of the gunge, and...well, if even a stunt show feels like the stakes are too low, you have a problem.