Let me blow your mind:
"What happens to the suspensions when you brake"
Depends on the suspension!!
Earles front suspensions rise on braking, transferring weight to the rear. Its counter intuitive until you realize that the forward momentum of the bike is on an arm that has to rise to allow forward motion of the body relative to the front tire.
I think BMWs paralever could also rise on braking, but could be adjusted not to and all were.
Something I've only read about... Earlier BMW motorcycles with shaft drive were infamous for their "Gummikuh" ("rubber cow") behavior, rising strongly in the rear when accelerating. The shaft drive was later modified to reduce that.
What happens to the suspensions when you brake? Front one compresses while the back one extends. That one was easy. Now this:
What happens to the suspensions when you accelerate? Front one extends while the back one... also extends.
Motorcycles are specially designed to have this last behavior.