That mission were you have to take back Mad Dogg's Crib and when you jump out of the plane with Woozie's men. We all jumped out and when you jump you are 3/4 of the hight bar up and we were falling and i opened my parachute but it failed on me and i just fell to the ground.
That also happened to me on the flying school on the part were you have to parachute onto the marker.
I was also on the huge tall building in Los Santos at the top with my PCJ-600. I never had a parachute with me and i never picked the one on the buliding up. So i jumped of on my motorbike and i pressed triangle by mistake and i started free falling. I got closer to the ground and i could see the ground under me and i was falling above the hotdog guy who has a stand near the building. I landed on the hotdog guy and killed him of the pressure of me hitting him at that great speed. The funny thing is i didn't die.