Who’s there?
Ether.
Ether who?
Ether Bunny hahahahahaha
Knock knock!
Who’s there?
Nuther.
Nuther who?
Nuther Bunny hehehehehehehe
Knock knock!
Who’s there?
Car.
Car who?
Car go beep beep knock Ether Bunny over chortle chortle
Knock knock!
Who’s there?
Boo.
Boo who?
Don’t cwy, Ether Bunny be back necth year.
Edited to add: Urggh this is so corny I have to put in an apology, I'm hopeless at remembering jokes and this one I heard oh waaaaay back like about 40 odd years ago, when I was but a baby bunny myself, so that's my excuse for it's corniness.
LL