Knock knock. Who's there? Radio. Radio who?

This knock-knock joke plays on a delightful bit of wordplay, hinging entirely on how a common word sounds remarkably like a familiar phrase. The humor mechanism here is a classic pun, where the setup leads you to expect a name, but the punchline cleverly twists that expectation into something entirely different.

The magic happens when "Radio" is pronounced, sounding almost identical to "Ready or." This sets the stage for the punchline, which is a direct reference to the popular children's game of hide-and-seek. The phrase "Ready or not (Review), here I come!" is a universal signal that the seeker is about to begin their search, adding a playful and unexpected layer to the simple knock-knock format. The phrase itself has been around for a long time and even inspired a 1968 song by The Delfonics, "Ready or Not Here I Come (Can't Hide from Love)". This joke takes that well-known phrase and uses phonetic similarity to deliver a giggle-worthy surprise.