There was a made-for-TV movie called, IIRC,
The Wave that we read as a play in ninth grade English class (I think - may be off by a year or two) that had a pretty disturbing experiment involving, essentially, creating a cult based around a symbol (the eponymous wave) rather than a religion.
And there's the classic
Twilight Zone episode, "The Monsters Are Due on Maple Street" where aliens turn off all the power in a city block ... then restore it to ONE house and watch the shenanigans...
And the infamous real-world experiment where a group of college students were told to deliver electric shocks to other college students at a set interval. Don't recall the details but it was mentioned in the television series
Irrational. The summary pages of the three seasons it ran for list a few, actually references a few famous experiments of this sort, like "The Trolley Problem"
Give someone employment. Their Job is to watch the baby shark video ten hours a day, five days a week, for 220k a year. They have one lunch break, three bathroom breaks, and are not allowed to have a cell phone or distractions. They get a comfy chair and full sized movie screen. They must get a good night sleep and remain attentive to the video the full ten hours or they don't get paid.
DODODODODO!!!
Heh. That's like the old "The Worst Job in the World" video.
You see a guy sit down at a desk in a suit and tie, and answer his telephone. "Yes!" he says, happily, and hangs up. Another call, seconds later. "Yes!" hangs up...
It goes on for another two minutes, with the guy getting progressively less chipper each time, and the last time, he just answers, and says: "Yes, Yes, yes, dear God, yes!" and puts his head on the table, sobbing.
Then you see the guy on the other end takes a step, dials his cell phone and asks: "Can you hear me now?"