Riddle: What goes knock, what goes knock, what goes knock knock, what goes knock knock knock. what goes knock knock knock knock knock, what goes knock knock knock knock knock knock knock knock
Answer: Fibonacci at the door.
Source: https://www.riddles.com/index.php/6739
What goes knock, what goes knock, what goes knock knock, what goes knock knock knock by casarelolz2004 Riddle
