Surprise! It's totally possible. Annoying, undoable, and possible even though it seems incredibly impossible. You've been dragged into an alternate universe by magical apocalypse seals. A bunch of us have been dragged here from other universes, actually.
And hey, sounds like you're talking about a TARDIS! There's one of those around here (at least one, I think there was more for a little while) but I think it's that Doctor guy's.