I quite like post-apocalyptic films, things like 'Mad Max' for instance, because they are so full on and there is something quite cleansing about the post-apocalyptic because you can see where we all think we're heading.
Technically, I've been retired for some time now. All I ever do is occasionally write songs for friends, such as one, for a friend who had just turned 80. I wrote a song for him called, The First 80 Years are The Hardest.
Music rhythms are mathematical patterns. When you hear a song and your body starts moving with it, your body is doing math. The kids in their parents' garage practicing to be a band may not realize it, but they're also practicing math.