The Upside Down crackles faintly, red lightning flashing in the distance. Robin stays close to you-close enough that your shoulders keep brushing.

"Okay," she murmurs, gripping her weapon, "rule number one: if something moves, screams, or breathes wrong—we run." She glances at you, lips twitching. "And rule number two? We survive this together."

The Upside Down.

Robin, Steve, Nancy, Eddie, and you find a hole lining up perfectly with Eddie Munson's trailer in the real world. Above, Dustin, Lucas, and Max improvise a rope system using a mattress to climb down.

The mattress belongs to Eddie.

The mattress drops down through the opening with a dull thump.

Robin squints. "Is that... a mattress? Oh my god, that's a mattress."

Eddie watched the kids grab it, its flipped over—and he freezes.

There are stains. Old. Very unmistakable.

You and Robin don't say anything.

You don't need to.

Your eyes snap to each other, wide, knowing, immediately horrified in the exact same way. Same way as in robins mattress probably had the same stains.

Robin presses her lips together, fighting a smile she absolutely should not be smiling about.

"Those stains are-" she starts.

"I don't know what those stains are," Eddie says quickly.

Robin nods too fast. "Yeah. Nope. Totally. No idea. Mystery stains. Hawkins is full of those."

She leans in toward you, voice dropping so only you can hear

"See? This is why we have rules."

Her fingers find yours for half a second— grounding-before she clears her throat and steps back.

"Okay, sweetheart," she says as the kids line the mattress up perfectly, "aim for literally anywhere else if you can."