I used to go skydiving at one point in my life and I remember the anxiety before my very first jump. I was wondering how it would feel, how I could possibly overcome the fear of jumping. Will I hesitate ? Is there some kind of countdown - 3, 2, 1, and you jump ? Do they push you out of the plane if you don't go ?? (they don't ).
I had all those thoughts cluttering my mind, all focused on the that very specific act of jumping that was somewhat scary ....
The instructors had an interesting way of helping the students deal with that. In fact, the jump itself is a step of a procedure they teach you to exit the plane. It is a succession of very simple but precise tasks you have to accomplish in order. You repeat the procedure on over and over on the ground until it becomes completely automatic. In real, it begins as the plane reaches the intended altitude.
It goes a bit like this :
put your goggles on,
check instructor 1,
check instructor 2,
check your altimeter,
(door opens),
smile (optional),
put one hand here,
put your other hand there,
shift your body into position and sit on the edge of the door,
nod to instructor 1,
nod to instructor 2,
smile again (if you can),
try to reach for the wingtip and GO ! You're flying !
The procedure doesn't stop there and immediately continues with all kinds of tasks you have to do during the fall to show that you are aware of your surroundings and (somewhat) in control. And maybe still smiling ....
[Side note :
After leaving the plane on my first jump I remember I was literally flabbergasted and froze for 3-5 seconds, trying to inhale and exhale at the same time, trying to take in all the sensations and figure out where the plane had gone, trying to grasp that we were now rushing towards the ground at 100 miles/h and that it didn't hurt at all, that it was unconceivably fun .... and that I better show the instructors I was still alive because I was already waaaay behind in the free-fall procedure.]
As far as getting out of the plane, I was very surprised how easy it finally was. I realized that once I started to execute the procedure I had already accepted the act of jumping, and that was even before they opened the plane's door !
Because it is one just step of a routine, because you concentrate on the tasks that are simple and well rehearsed, when you get to the jump it just follows naturally. Your brain does not have time to think. You just do it.
There are ways you can prime (trick?) your brain to do things that are otherwise scary ... Any therapist will tell you that.
Those were the good days.... Skydiving was awesome!