Suicidal Cat

Will someone please explain to me what the hell is wrong with my feline? He’s gotten into this habit of finding ledges that overlook the 2.5 story drop down to the ground from my apartment, sitting on them and just well being there. It scares the shit out of me. I know falling scares the shit out of him because I have held him hanging over the precipice to make sure he knows how dang far up he is. I only want to scare him because I don’t want him to be hanging out in spots where he can fall. A gust of wind or something similar would do him in. I don’t want that to happen.