Jerry Seinfeld has a neighbor — and lately, there's been a weird glow coming from across the hall and lighting up our feeds. Jerry's neighbor, Kramer, was always an odd character, but with the addition of this new format, we all can recognize just how many possibilities there are for the things happening behind the scenes in Kramer's apartment. This new trend is known simply as Kramer, what's going on in there? and blends hundreds of different franchises into Seinfeld's world.

The sheer irrelevance of the things happening in Kramer's apartment makes these such hilarious jokes, since no one can picture Kramer alongside any of these things; knowing Kramer, if his apartment was an interdimensional portal, these theories on what's inside seem about right. And now, the Seinfeld universe now contains every other niche show or film out there, all emerging at once. Let's have a look.