And wondered if he transported himself to another station in the meantime.

Or if he's gone to another plane of existence.

Cause.... where did all these people come from? Oops, he dug through most of their stuff.

He saw that wing C had been closed out from the outside, didn't have a chance to post about that, so he's just coming back to the ship and suddenly it's open...

Accidentally transported to an alternate reality: a distinct possibility.

He was outside, he wanted to try to blast his way in through a closed window.... and accidentally the rebound threw him into deep space. John needed to be called.

So when he returns... John, did you bring him back to the wrong reality?

Man, I haven't had a chance to really tag out yet and it feels like part two dropped already.