Does Aikido teach how to defend yourself in tight quarters like an elevator?
don't know about aikido, but the systema folks have interesting approaches http://www.youtube.com/watch?v=_YPrnB-OSBA
some of the moves similar to various aikido moves like sokomen-irimi or kaiten and so on. I like the car thing too http://www.youtube.com/watch?v=l1ckXOkyLSk
would not want to try the bag over the head thing, but it looks fun.
wonder if they have anything for plane, train and automobile.