Fear of hights

I was walking in my friend's (Sos A) building's corridor on the 3rd floor. Tiny corridor, really high up.

I have a fear of hights.

But I'm not sure anymore...

Do I fear falling or fear that I'm so curious to experience the falling that I don't trust my brain not convincing my body of jumping?

Maybe a "fear of hights" is just a fear of me convicing myself of jumping, since I know the outcome already.
However, I might still want to jump. Maybe because I believe I can get a different outcome or because I'm inherently a curious person who want to experince the journey.

Don't worry, so far my brain couldn't win this argument (and I don't think it ever will).
-BT