Yes, that is a famous experiment.

In reality, someone who is an authority figure telling us to might be enough.

It's scary how much authority really has an overhand on most of us. If I'm not wrong some of the "victims" of the experiment were quite traumatized of the experiment, but they still didn't stop. That's the scary part: they never would've thought they would be able to do such thing, but it seems it's harder not to when faced with a convincing authority.