It stands still for about ten minutes, then hops to the front of the car, by the window. After about five minutes, it hops past him to the back of the car.

Aww. It's almost cute.

He'll go play around on his phone some more then. Ugh. He can't even properly relax because he has to be aware for if the stupid subway car does something he's not expecting that he needs to react to.

Oh well.

The car keeps going through nothingness. After fifteen more minutes, the stack-thing buzzes and hops back to its earlier seat.

Still almost cute.

He watches it for a short bit, then gets back to his phone.

It sits in its seat. After another ten minutes it spins some of its prisms completely around, and buzzes sort of melodically for a few minutes, then stops and holds still again.

The darkness outside the car seems - closer? It's still impossible to see out of, but it seems like it might be moving.

… That's curious enough that he decides he will watch the darkness instead of his phone.

Despite still being just utter empty blackness, there is a definite impression that the darkness is crawling, or dripping around the windows.

The stack-thing buzzes and hops up to him, uncurling a ribbon of its side and leaning toward him.

Aww.

He keeps some water near him just in case he needs to defend himself.

There is a distinct impression that the darkness is infecting something, getting inside of things and turning them into more of the crawling darkness. Perhaps it's a good thing that the doors are so difficult to open.

The stack-thing leans into him, and curls a few of its ribbons around a pole.

… He keeps his collections of water on-hand, prepared to direct them against something if necessary.

Weird darkness giving him a weird impression of infection. He's pretty sure darkness doesn't do that normally even if it is infecting things.

A sense of wrongness, of contamination, the darkness seeping into everything within it, pressing against the seams near the windows and doors, but not finding an entrance.

It seems to stop, and settle around the car, unmoving.

After about half an hour, there is an impression of darkness dripping away, running down the windows and falling past the car.

Well at least this weird subway car seems airtight, albeit extremely weird and also bizarrely difficult to damage.

After a few more minutes, it feels like they're out of the contaminating darkness, and back in the boring empty darkness.

The stack-thing relaxes its wrap around the pole, but continues leaning against him.

Well it's nice that the darkness is gone. How kind of it.

(Cute stack-thing. He really hopes he doesn't have to spear you, that'd be sad.)

After about twenty minutes, the subway car emerges into dim blue light.

The surrounding landscape seems to be the bottom of a vast cave, with spiraling stalactites and stalagmites stretching from the ceiling and floor, and some merging together to form pillars. There's a hole, somewhere high up, letting light filter down to reflect from the tiny glittering blue and white crystals covering every surface.

The doors slide open with a chime.

Pretty.

And if he steps outside the subway car, tentatively, does he die from breathing in something immediately toxic?

No. The air seems to be breathable, although it's cold enough that his breath fogs and his fingers sting.

The stack-thing follows him out of the car.

Any water around or is he going to have to deal with his current quantity? Plus the weird goop.

There might be traces of water in some of the crystals coating everything. There's a bit of water in the air from his breath, and some moisture somewhere above the roof of the cave.

He can't do much with the moisture in his breath unless he wants to form a very small haze, but it's useful to know there are traces around him.

He walks around a bit. Observes the kinda-cute stack-thing.

The ground is uneven, and some of the rocky crystals coating everything crunch underfoot, but others do not.

The stack-thing is following close behind him. It seems a little wobbly on the ground. His footsteps and the stack-thing's hops echo.

After about a minute he'll walk back to the subway car. He hasn't seen anything novel and interesting, just a bizarre cave, and he's still holding out hope he might get back somewhere recognizable.

He wonders who would be able to build something like this, the subway. Or who would.

It doesn't really feel like the sort of thing that would constitute a 'disaster'.

The stack-thing hops on a few of the stalagmites, breaking off the ends, which are vaguely visible inside its middle segments.

It hurries to follow him back to the car when it notices that he's ahead.

It does look like a subway humans might construct, although most don't travel like it does.

Yeah, he hasn't really had much experience with subways going through weird voids to other planets. It's just – it doesn't seem like something someone would get out of a power, it doesn't seem quite like the typical genre of 'disasters' they get in his world, it just looks like a weird supernatural event that's occurred.

Then again, the powers and the supernatural disasters didn't start until a few years ago, so perhaps this is just part of the next step.

He stands near the door to the subway car and waits for the stack thing.

The stack thing hops around breaking off a few more chunks of stalagmite, picks some of them up with three ribbons from its sides, and follows him into the car.