Audio problem: The keys we see being depressed on the player piano never bear any resemblance to the actual notes we hear. (00:13:00)
Audio problem: When Markie is finally revealing to Helen who she is, Terry Burnham (Markie) is standing behind Janice Rule (Helen) talking to her over her shoulder and can be seen mouthing Janice's lines along with her in between her own.
A Passage for Trumpet - S1-E32
Audio problem: When Joey steps in front of the truck, a lady screams and it shows a close-up of her face. It pans out to a wider shot and for a moment, you can still hear the scream, but the woman's mouth is closed.
Audio problem: Throughout Corwin's scene with the two children on the street, and through Rod Serling's subsequent introduction to the episode, you can hear the loud hiss of fan blowers used to waft artificial snow onto the set. (00:04:50)
Audio problem: For reasons unknown, the child's voice throughout this episode is played by an adult actress trying to sound childlike - and the unconvincing imitation is painfully obvious. (00:19:25)
Mr. Dingle, the Strong - S2-E19
Audio problem: The sound of the table breaking begins before Mr. Dingle hits it.
Answer: It's explained in the episode. The aliens are experimenting to see how humans react to various scenarios. This just happens to involve them using super strength.
Thanks. It's been a long time since I saw the episode so I forgot.