>shoot self
>instincts kick in and realize what the fuck is going on, and prevent you from jumping
alternatively
>shoot self, jump
>have little to no control on how you land
>land on butt or feet
>die after several hours/days of excruciating pain
>or worse, after several hours/days of excruciating pain survive, but permanently disabled
Maybe if you had some sort of drugs it would work.