There are 2 fear factors:
1. The mere tots of it...scared of dying, scared of heights,
etc...whatever the fear, you have to learn to deal with it...accept
it...control it...etc...tought to tackle without knowing the fear
factor.
2. The physical feeling. You have to trick your mind into
following the motion of the fall, the sharp bends, etc...do not
focus at short dist objects...instead....look far and anticipate
the direction...