The Tap
The fingers drum on a table or the person's body.
Meaning
Impatience
The person wants to somewhere else or is under time pressure.
Please make your point.
Frustration
The person would like to interrupt the person speaking.
You must have noticed that I don't like what you're saying.
Explanation
The non-verbal sound sends a clear signal of frustration. The louder and faster the knocking the more the person feels stress. Change the subject or end the conversation.
Categories
arm