Well those knees pads may be brakes for some folks but a lot of prople wear them because they fall forward. And when they do they hit their Knees first followed by their hands to brake the fall.(get some gloves to) Rabbit is correct though falling backward happens also.

__________________
"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….