The International Space Station. The sheer confusion value would be amazing, particularly if I stayed quiet about how it happened ("I went to bed, then woke up floating here. I've no clue how it happened").
I would get to cause a major incident of complete chaos, with little to no harm. I would get to experience space and weightlessness. I would also get a near guaranteed lift home (eventually). There's also almost no way it could be kept quiet, so I get to be a minor celebrity for a while.