EXPLANATION:
The Rocky Horror Picture Show is a "cult" movie. Pre-COVID, during summers some movie theaters would show it at midnight on a Saturday night. Fans of the 1975 movie would come dressed in costumes, etc., and LITERALLY recite the dialog FROM MEMORY along with the characters. AS A GROUP they also would speak back to the characters, all saying the SAME responses.
That's where the phrase "No sh*t, Sherlock!" originated.
Understand that it's not just one or two fans--MOST of the audience does it. They've seen the movie SO MANY times that they've MEMORIZED the dialog to a 1 hour 41 minutes of movie!
FORENSIC FILES was a half-hour show that explains the events in a specific REAL MURDER CASE and goes through the forensic evidence in detail. Often it talks about "the very first time this evidence technique was ever used." (Most episodes were about murders.)
How many times would a person have to WATCH THE SAME EPISODE--ABOUT A MURDER--to be able to recite a half-hour of narration FROM MEMORY?
https://en.wikipedia.org/wiki/Forensic_Files
https://www.imdb.com/title/tt0247882/
