If you had an empty bucket and found out that the room you are currently in(yes the very one you are in in real life) somehow ended up getting thrown into space (because of extreme calamities?) Oh.. And you are an immortal being So.. What's it going to be for the next 1000years? Better plan for the future! Is there a skill you'd like to master? If it were me, I'd hop real hard on the floor, hoping it would bring me back to earth. I'd use the bucket to fish for spacemonkeys and spacefishes as a food source. I'd call upon Thor to bring me to his magical kingdom and convince him Natalie Portman is busy celebrating christmas and has no time for him. Then, I'd take some soap and make bubbles outside my room and step inside one of em and enjoy floating around space. After 500years or so, I'll go visit Yvonne and Dunstan (Stardust) and learn the ways of a star. Perhaps I'll marry a star too. and live happily ever after. So.. What about you?
First I would throw my sister out. She's annoying as hell and with her I would face imminent death from an unidentified flying bucket. Then I would...ummm...ya know, once I got my sister out of the equation, my mind goes blank. I think that would mean that I would be floating on clouds or something else equally positive, so I'll stop thinking while I'm ahead.
First Id panic, run around the room, trip over the bucket and knock myself out for a few hours. Then I'd wake up, forget I was in space, open my door and fall out. After that I'd catch a comet and name it Skipper and ride off into the milky way.