When you're on the ground, you have to always look behind. Someone might steal your bag, or you might get shot in a drive-by shooting. You respect the Earth, and it respects you in return. If you don't, then one day, it'll jump up and bite you in the arse. But not just while you're skydiving.
Accidents can happen anywhere.
But even if the thrill factor of base flying rates higher that skydiving, Paul knows that he can never give up his first love. Like when you get your first skateboard and you feel like you can do anything. You feel invincible. Accept that it is your responsibility to take care of your own life whenever you jump. You must never get complacent.