im assuming you're not holding in the clutch so you must be shifting very quickly
Clutch in, down 2 gears, clutch out (slowly), all while simultaneously braking
90mph-40mph in 3-4 seconds isn't impressive lol
I found a better representation
https://www.youtube.com/watch?v=QvPDM-1BvwkGo to 8 minutes in the video, and look at the distance it takes for him to go from 50mph-0mph (the same drop I had)
Started braking at aroung 8:39, was stopped at 8:42