Knock knock. Who's there? This isn't a door.

This isn't a door who? Exactly, you're knocking on a wall.

Knock knock. Who's there? Candice.

Candice who? Candice door open? I'm getting board waiting!

Knock knock. Who's there? Hugh.

Hugh who? Hugh-man, I've got a 'Hugh'-ge request: can you 'Hugh'-mor me by letting me in? Because this joke is so pun-tastic, you'll 'Hugh'-rry to tell all your friends, and they'll 'Hugh'-ge-ly regret not being here to 'Hugh'-ear it first!

Knock knock. Who's there? Canoe.

Canoe who? Canoe believe how many puns I can *canoe-dle* into one joke? I'm practically a *canoe-isseur* of wordplay!