Knock Knock.
Who’s there?
Usain.
Usain who?
You sayin’ I’m the greatest? No? OK I say it, “I’m the greatest!”

Knock Knock.
Who’s there?
Anna.
Anna who?
An’ now to the political part of our movement!

Knock Knock.
Who’s there?
Barack.
Barack who?
Brake on the economy, but not on my presidential re-election bid. Thank you Romney!

Knock Knock.
Who’s there?
Modi.
Modi who?
More the people discussing my PM’s chances, the greater chance I have! Keep talking!

These versions by Sunil Rajguru