Someone knocking at your door for no apparent reason.
I'm not sure, I hallways forget
Step one: Open the door. Step two: Put the elephant in. Step three: Close the door.
A. "It's okay Daddy I'm not hurt."
Knock, knock.
A bird that talks in morse code!
It was stuck to the chicken's legs.
That I will open the door
Ding Dong
Nobody asks, 'who's there ' when you try and tell a knock knock joke.
Because they don't believe in higher powers.
An argument
Someone who knocks on your door for no apparent reason.