In Knives Out, when the detectives start investigating the family, Benoit Blanc just keeps hitting a single note on the piano, which builds tension.

I remember there was such technique in other thriller.

What is the reference for using this technique?

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    This question has been edited substantially from its original intent, and the answer reflects a totally different question than what was originally asked. I tried editing to clarify the original question, but that edit was rejected. I’m leaving a comment in hopes someone else with a bit more reputation can come along and put things right. – LessPop_MoreFizz Dec 8 '19 at 21:03
  • @LessPop_MoreFizz I'm confused. Are you talking about the change from revision 1 to revision 2 ? What's the difference in the question, apart from tidying the language? – AakashM Dec 10 '19 at 15:12

It seemed to be he hit the piano each time he suspected the one being questioned was lying. If I remember correctly it occurred after the flashbacks to what actually happened and to what the person says.

It also got a reaction from the person being questioned, making them nervous.

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  • yes, but I think it's taken from previous movie or book – user7294900 Dec 3 '19 at 14:29
  • @user7294900 then you should edit the question back to ask that in the title. I know you didn't edit it this way - but if that is the specific question you want answering, then I would make that change. – iandotkelly Dec 3 '19 at 16:28

To be honest, he was hitting the keys (or rather that one particular key) to indicate his lieutenant (Lakeith Stanfield) to ask a specific question. He just seems to enjoy the theatrics of it.

Though initially, I thought he was hitting the key whenever the investigation got derailed from the main objective. It was an annoyingly, polite way to tell the lieutenant to get back to the point.

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