Because you can knock a door with your hand down as well and it would be more convenient?
In: Physics
So I can see my hand to get an accurate knock without awkwardly looking down?
Why people raise their hand when they knock a door?
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Because you can knock a door with your hand down as well and it would be more convenient?
In: Physics
So I can see my hand to get an accurate knock without awkwardly looking down?
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