that's not the full broom closet ending. Basically after the end of the second player bit, you got to leave it alone for an hour before the narrator gives up and says, "Fine, you win. Happy? ... Hello? Maybe you really did die." Then the game resets to the main page.
but the dev has a troll streak so he made that time limit to a random number that changes per playthrough. For some people it's an hour and for some, we never got that far. I remember reading about a person that decided to spend the time to rip into the programming to find all the endings and scripts and he said there is even a few that can't even be activated. I guess the dev decided to stop making endings at one point and just move on.