Bouncing should be left for bouncing castles.
At 68, over the past three years, I have torn the ligaments in my left knee, the quad tendon on my right knee, and woken up in an ambulance on the way to A&E with concussion. Twice on an mtb, once on a road bike. I can vouch that you eventually lose the ability to bounce!
I've stopped going to Cwmcarn and Merthyr bike trails and stick to roads and fairly easy XC.