Throw weird stuff with no explanation at your players sometimes. The last thing you want your game to be is predictable, and twisting the entire thing at right angles and introducing bizarre stuff that seemingly makes no sense is a good way to keep things interesting.
Of course you should have some sort of justification up your sleeve, in case they demand it. But often players will be happy to take things as they are presented and chalk it down to forces they don't comprehend just yet. They can also come up with strange or brilliant justifications themselves as they theorise over what's happening. (GM secret: If you like any of those, you can quietly adopt them and tell them how clever they are to have worked it out, while tossing your own explanation out the window.)
Commentary by memnarch (who has not seen the movie)
Wow, okay then! I guess we're not done with the Millennium Falcon scene yet after all! Why did they just suddenly get pulled out of hyperspace? What crazy astral body did we just come across? Is there going to be a cabin with a knife-happy princess inside somewhere? (Okay, fair, that one's actually impossible due to media release dates, but the visuals are close!)
Speaking of visuals, I think we're still actually in space. There's the red sun thing in two of the panels, but then we get a bunch of purple-white after that. Plus, the second panel has both colors in it, but from different points. If this ends up being a binary star system of some kind, that's going to be so cool! Plus, that'll give Jim the perfect awesome excuse.
It's really curious that there's immediately TIE fighters on their tail though. Unless the First Order did a massive overhaul on the design, they're still short range fighters. Which means that the Falcon probably jumped into the middle of a First Order base somehow. Oooo, or maybe they've been working on a Quantum Catapult of some Star Warsy kind to fling ships around the Galaxy now! That would be a cool "final boss" location sort of thing to get blown up in a space fight. Exegol just doesn't have the visuals for a climactic fighting finish, plus it's missing a giant superweapon that the Irregulars can turn into a time-based machine.
... At least When isn't a question that needs to be answered. Yet.
Transcript
GM: You drop out of lightspeed suddenly!
Chewbacca: What?
[SFX]: Shooowwp!
GM: You’re flying through a dense forest of giant stone stalagmites.
Chewbacca: Where?
GM: Fighters appear right behind you, guns blazing!
[SFX]: vreeeeooooowww... vreeeeooooowww... vreeeeooooowww...
[SFX]: pow! pow! pow! pow! {the pursuing fighters fire at the Falcon}
Chewbacca: Who??
Poe: Guess they got dragged into hyperspace with us.
Chewbacca: How?!
Finn: Maybe the hyperspace modulator got tangled with whatever R2’s doing with that liquid space-time.
R2-D2: I’m not doing anything!
Poe: So, an uncharted geological death maze with enemy ships hot on our tail?
GM: Piloting roll at -6.
Chewbacca: If you even think about saying this is awesome, I’m going to rip your arms off.
R2-D2: If I were doing something, there’d also be some sort of giant space monster involved.