Continue climbing. At least I remember falling from a tall place. Maybe I'll find everyone at the top.
Continue searching for the others. It's been already 4 turns searching without any results. At least find the place I fell from.
"I am absolutely certain this is the wrong way! I'll keep going anyway!" (1) It's getting hot and cramped in this little tunnel. You see a warm red light ahead, around a bend, and hear something like a distant roar of wind or like a waterfall. Suddenly, the area you are in shakes, and the tunnel behind you twists closed. You crawl forward to the turn and discover a passageway to the left, and one going up, as well as one going straight forward. the one going straight forward is dark. The one going up looks bent, like it was damaged by the same quake. The one going right ends a few yards on in a grate. Bond the grate is an active furnace. Charcoal is being dumped in from a conveyor on the other side of the room. It's uncomfortable to be even this close.
Open the hatch, shout for everyone to get inside
"EVERYONE! I FOUND THE WAY OUT! HURRY OR I'M LEAVING YOU!"
"Damn mind being not attached to this tin can of a body! I keep phasing out. Where the hell am I? Oh fuck, metal spiders. Not good."
Follow Vladen down to the access hatch thing. If any spiders try to eat me or whatever, use my zappy dagger on them.
Speed happily to the exit. Make some noise so that the others know where I am and where the exit is. The marks should help guide the way.
Follow Vlad and give him a compliment
"Vlad, you are barely as ugly as most humans."
You all head out through the hatch into a wide corridor. It is a long one that bends slowly to the left and down, and to the right and up, as if you entered from the side of a long spiral.There are no apparent exits immediately visible. To the right and up, the corridor is destroyed, torn open and smashed closed, so you head left, and down. You walk for some time. There are signs that this tunnel is used: from the wide, shallow twin grooves worn into the center of the floor, to the piles of trash strewn about along the walls, to the small vermin scurrying about - little scavengers living off the detritus of other beings lives.
Then you come upon a wide, clear window in the outer side of the tunnel. You find that you are near the top of a deep cavern. The ceiling above looks curved, like the inside of a sphere. You can see in the distance pillars, networks of passages, and machinery too big to be real. There are pipes larger than rivers, presses big as small hills, furnaces large enough to burn mountains. You see some kind of gondola transportation system as well. You can't tell if the gondolas are occupied, but many are moving along suspension cables that crisscross the space out there. You try to look below, but the window does not give a good view of directly down. As you look, your view is suddenly obscured by what looks to be a school of rust red, dull steel grey, and vivid orange fish. Some of them even have flashing red patches on the tips of their fins, like some bizarre warning system. Each fish is larger than Freddie, andthere are hundreds in the school that passes by.
Besides the window, you find, on the inside curve of the tunnel, two exits. One appears to open directly into that space, and is wide enough to fit the carts, should you manage to open the hangar door. the other, further up, looks like a more normal sized door, with a little vertical window. it looks to open onto a stairwell. Freddie could fit down the stairs, but the carts could not navigate the space.
so, basically, you have a choice:
1) continue down the spirally corridor, riding the carts in luxury and style. Deal with the wildlife or whatever uses the tunnels.
2) risk the open underskies with machinery, unknown beings being transported everywhere, and schools of flying fish - or perhaps it's all underwater and the fish are swimming
3) ditch the carts and go by foot, down the stairs.
Also, you can try to figure out what happened to Rex. You never saw him on your way down.