If you know how to tie a clove hitch, the PCT method is pretty simple.

The chances of a bad encounter with a mountain lion is very small. I know that doesn't help, I still think about the possibility of a crash every time I get on an airplane. It can and does happen. I like to carry a method of fighting back, even if it's only pepper spray or a knife. Of course, mountain lions are likely to hit from behind, so it's entirely possible you won't get a chance to use the weapon. But it does provide some small peace of mind.