It really isnt that hard. I usually have lots of health packs with me but I rarely get hit anyway. I was just stuupid and should have slowed down during that skydiving sequence. I even unlocked a trophy for killing a Brute without getting damage from it
what sucks about me dying there was that I had shitloads of ammo and a good amount of money.
Game might get harder once going back to Ishimura though.