'Sabrina' Features Surprise 'Riverdale' Crossover and Fans Are Scrambling to Figure It Out

From the beginning fans have known that Netflix's new series "The Chilling Adventures of Sabrina" existed in the same universe as "Riverdale," but still a surprise crossover caught them completely off guard.

Once the supernatural spinoff series shifted over to Netflix (it was originally developed for The CW), it seemed less and less likely that the popular "Riverdale" could spin into the new series. For one, "Riverdale" is grounded in reality, even if it seems like surreality at times, while "Sabrina" is a literal teenage witch.

On the other hand, though, Sabrina and Archie have co-existed in the same comic book universe for decades, though the rules of continuity aren't nearly as strict in Archie Comics as they'd likely have to be on television. So "Riverdale" fans were stunned to see a surprise crossover in the seventh installment of "The Chilling Adventures of Sabrina."

They were even more shocked when they took another moment to process just who they were looking at. Delivering a pizza in Greendale like it's just no big deal was none other than Ben Button. And if you're not caught up on "Riverdale" yet, you might want to stop reading here and go do that. No, for real.

Ben has been a bit of an enigma throughout the run of "Riverdale," cropping up in all kinds of weird places, but most recently seen throwing himself out of a hospital window saying, "You'll fly, too." Yes, that was a blatant nod to Pennywise from "It."

While fans were scratching their heads and trying to figure it all out, executive producer of both shows, Roberto Aguirre-Sacasa told was busy stirring the cauldron for Entertainment Tonight.

Rather than answer pretty simple questions, Aguirre-Sacasa instead chose to be as mysterious as possible. Like, did this scene just happen before the window incident. Pretty straight forward yes or no question, right? Not so fast.

"That's a good question, and that depends. It suggests a very deep, deep mythology where time and space bends," Aguirre-Sacasa said. "I love that kid. I'm sad that he keeps turning up and horrible things keep happening to him."

Ooooookay. So he could have survived that fall, then? " It seemed like it was pretty final, but yet there he is in Greendale. But in Greendale, everyone pops up -- the dead don't stay dead long in Greendale."

Oh geez. He's no help at all, leaving "Riverdale" fans on their own to try and make sense of it, once they got over their shock at seeing him at all. We've gathered some of the best responses below: