Bet you can't do this with your bike

Can you do the maths inside your head to translate velocity into the upside down force in the radius inside the pipe to stay stuck to the ceiling - so to speak.... He is a little bit slow, and his tyres lift off a little.... Yeah maths... Can you do it?

I want to pass out with fright - even looking at the starter picture...... I guess I am kind of "Crash" + "Broken Bones" + "Paralysed" + "Dead" averse.....