I would never want to take my parents to court over a fall. Family relationships mean more to me than a payout, unless there was something far more serious behind the situation which will still be hard for me to sue my parents.
Happy belated birthday! That's an awesome gift. I don't play any instruments, but if I had the chance, I'd probably learn the piano. Have fun with the drums.
Not that I know of. If I twitch my leg while sleeping, it's never been noticeable enough for anyone to mention it, so I guess it's not something I do often.
The weather determines if I wear one or not. I rarely wear one. In hot weather, I'd rather stay comfortable with just a shirt than deal with the extra heat from a singlet.