We dropped from 40000 to 32000 in less than 2mns according to the map data on board the a/c. There was some ear popping but honestly not significant in my case. What was more noticeable for me was the pitch down which did feel significant. We then descended a bit more sedately through first layer of clouds to 28000. We also increased speed and what I was watching on board does tally with FR24 as we went from about 560/570mph to a max of 663mph. I attempted to work out where over Scotland and it looks as though it was over Cupar. Actual timing was 0902 local time on morning of 1/1/15 so I suspect the skies over Scotland were quite empty at that time.