1, that's absolutely feasible and the body-swap beam can in fact get you whether you're indoors or not, so swap away! Enjoy being briefly levitated through a train, Ryan.
Once Min-Gi has figured out how to work his new limbs, with that door pried open he'll be able to make his way into precisely 1.5 spacetrain cars before being blocked by what seems to be just a whole bunch of sand. He'll find intact seats with their cushions long-since rotted away, leaving mostly tufts of padding and rotted bits of fabric everywhere.
Down near the end of the first car—which is a tough climb, because this thing is jutting diagonally into the earth—there appears to be a pile of about three suitcases. Two are fabric, or were, and only their metal clasps and a few scraps remain; one was a hardshell plastic sort of thing, and while it's been cracked open, there's more intact fabric in there, including what was once some weird space-agey clothing and a strange little bit of metal with bristles on the end.
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Once Min-Gi has figured out how to work his new limbs, with that door pried open he'll be able to make his way into precisely 1.5 spacetrain cars before being blocked by what seems to be just a whole bunch of sand. He'll find intact seats with their cushions long-since rotted away, leaving mostly tufts of padding and rotted bits of fabric everywhere.
Down near the end of the first car—which is a tough climb, because this thing is jutting diagonally into the earth—there appears to be a pile of about three suitcases. Two are fabric, or were, and only their metal clasps and a few scraps remain; one was a hardshell plastic sort of thing, and while it's been cracked open, there's more intact fabric in there, including what was once some weird space-agey clothing and a strange little bit of metal with bristles on the end.