"Raf - ID (Preview)" Yes, I have listen to it before and I'm really, really impressed! I particularly like it around 1.10 and forward.
Haha, mountain king by grieg. I remember so well the panic this piece gave me when I was around ~ 5. I got sooo scared by it
Music should be simple and playfull. Much of the today's music is unfortunately over the top, luckily there is good old music!
Two instruments, simple and playfull: Jan Johansson - Stepp, min stepp (1967)