When I was 12 I didn't listen to albums, music was just singles on the radio or whatever my parents listened to in the car, so probably Tubular Bells, UB40 or Motown compilations.

Complete defoliation of a bonsai maple can be performed in late June to encourage a full second flush of smaller leaves in a beautiful deep red colour, the tree has more than enough stored energy to do this. It only takes around 4 weeks to get back to a full dense canopy. Not recommended every year as it does consume energy but you can do it every few years. I assume a full size maple can withstand a similar treatment, certain seems so according to your observations.