Basic physics:
Principal of innertia or centrifugal forces.
You used to be about 75kgs so in a sharp turn, you were able to control the limited forces applied to the board with your legs.
At 86.54 kg you have broken the barrier and you are therefore collapsing like a blob of mash potatoes being projected against a window.
I hope that I have clearly resolved your issue and look forward to watching you in action.





