Unintentional hilarity in "TZ"
The howls in "The Howling Man."
Pronouncing "robots" "robit."
"The Staff of Truth!" in "The Howling Man."
Serling's intros in "Static" and "Lateness of the Hour" where it's painfully obvious Serling is reading off of cue cards.
The dino in "The Odyssey of Flight 33"
That woman's screams after Joey Crown is hit by a truck.
Speeding up the film when Fred Renard is hit by a car.
The helmets the astronauts wear in "The Lonely."
The Chancellor in "The Obsolete Man" being dragged down that ridiculously long table by the zombie hordes.