![history - Where does this famous rhythm pattern come from (oftenly used to knock on a door)? - Music Fans Stack Exchange history - Where does this famous rhythm pattern come from (oftenly used to knock on a door)? - Music Fans Stack Exchange](https://i.stack.imgur.com/EVhUr.jpg)
history - Where does this famous rhythm pattern come from (oftenly used to knock on a door)? - Music Fans Stack Exchange
![YARN | (knocks "Shave and a Haircut") | The Big Bang Theory (2007) - S06E21 The Closure Alternative | Video clips by quotes | 51db7488 | 紗 YARN | (knocks "Shave and a Haircut") | The Big Bang Theory (2007) - S06E21 The Closure Alternative | Video clips by quotes | 51db7488 | 紗](https://y.yarn.co/51db7488-0c4f-48ae-abe6-8d9739c8d072_text.gif)
YARN | (knocks "Shave and a Haircut") | The Big Bang Theory (2007) - S06E21 The Closure Alternative | Video clips by quotes | 51db7488 | 紗
![Rob Walton on X: "@PFTompkins When I hear that, I'm like Roger Rabbit trying to resist singing "Two Bits" after the "Shave and a Haircut" knock. https://t.co/xoUJNOSSPm" / X Rob Walton on X: "@PFTompkins When I hear that, I'm like Roger Rabbit trying to resist singing "Two Bits" after the "Shave and a Haircut" knock. https://t.co/xoUJNOSSPm" / X](https://pbs.twimg.com/tweet_video_thumb/DGgravWWsAA4Mbt.jpg)
Rob Walton on X: "@PFTompkins When I hear that, I'm like Roger Rabbit trying to resist singing "Two Bits" after the "Shave and a Haircut" knock. https://t.co/xoUJNOSSPm" / X
![Looney Tunes on X: "1918: Shave and a haircut, two bits. 2018: Shave and a haircut, two bitcoins. https://t.co/6D1OlZ4A7Q" / X Looney Tunes on X: "1918: Shave and a haircut, two bits. 2018: Shave and a haircut, two bitcoins. https://t.co/6D1OlZ4A7Q" / X](https://pbs.twimg.com/tweet_video_thumb/DYGge1xVQAITsrm.jpg)