The knock speeds up.
Answer is open the door and just put the elephant in the fridge.
Some say he had a foot in the door... and the window... and the wall.
Nothing if her husband knows what's good for him!
No bunny knows...
Because she had no arms. "knock knock" "whose there?" "not sally!"
To get to your house... Knock, knock. Who's there? The chicken.
Because it was stationary.
To slow down speeding geese!
A drummer...
Drummers.