Why can't you tell Walter White a knock knock joke?
Because he is the one who knocks.
The knock-knock joke is a question-and-answer joke, typically ending with a pun. Knock-knock jokes are primarily seen as children's jokes, though there are exceptions. The scenario is of a person knocking on the front door to a house. The teller of the joke says, "Knock, knock!"; the recipient responds, "Who's there?" The teller gives a name (such as "Noah") or a description (such as "Police") or something that purports to be a name (such as "Needle"). The other person then responds by asking the caller's surname ("Noah who?" "Police who?" "Needle who?"), to which the joke-teller delivers a pun involving the name ("Noah place I can spend the night?" "Police let me in—it's cold out here!" "Needle little help with the groceries!").
Because he is the one who knocks.
Him: Why did Timmy fall off the swing?
Me: wh...
Who's there?
Ana
Ana who?
Ana gonna tell you
Why did Sally fall off the swing?
Because she...
Knock-Knock
Who's There?
P.
P Who?
No, not ...
If you hear knocking come from your screen then...
You know, the person who made knock knock jokes...
"Who's there?"
"santa"
"santa who?"
"santand...
Knock knock!
Who's there?
Polish math prodigy...
"Syd who?"
"Dys Leiax"
"Why did the chicken cross the road?"
"Why?" ...
Mailman.
Knock knock.
Who's there?
Awkward silence.
A...
Her: Why did Sally fall off the swing? Me: Why...
1 - Why did Susie fall off the swing?
2 - Becau...
"Knock Knock!"
"Who's there?"
"Boo!"
"Boo wh...
Her: Why did the chicken cross the road?
Me: Wh...
Every week a guy I work with sends out jokes, h...
Me: who's there?
Her: Orange
Me: Orange Who?
He...
She had no arms.
Knock, knock.
Who's there?
Not...
Who's there?
Dunup
Dunup who?
Knock Knock...
Who's There?
Autch
Autch-Who?...
Knock knock.
**Who's there?**
Pol...
Knock-knock
Who's there?
Doris
Doris who?
D...
*Shini: Knock-knock!*
**Juno: No solicitors! G...