This Is The Knock-Knock Joke That Has The Entire Internet Laughing
Some jokesters hijacked their friend's Facebook post and it all came together perfectly.
By 
Jacob Geers
Some dude just wanted to post a simple knock-knock joke on Facebook, but somehow everything went hilariously wrong.
Instead of letting him finish his post, some friends jumped in and made the whole “joke” more funny that it could have possibly been otherwise:
