If you are looking for the "full" story behind the meme, it typically refers to a viral video where a person asks "What happened?" in a distinct, often comical or high-pitched tone.
Meme Origins: Understanding a meme requires knowing the "full" history. Sites like Know Your Meme help users trace how a phonetic misspelling like "whatchapne" transformed from a typo into a cultural shorthand. How to Use It Correctly whatchapne full
They have heard the 10-second sound bite a million times. Now they want the full context of the joke. If you are looking for the "full" story