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and you realize your parachute isn't opening. You're definitely going to die when you hit the ground.
What would you think about/do for the last 5 minutes (or however long it takes you to hit the bottom)?

First I would tell myself it wasn't really wasn't really happening. Then I would be ticked off at my parachute for not opening. Then I would beg my parachute to open. Then I would just cry. Then I would figure, oh well I had a good life. (5 stages of grief). Then depending on how much time I had left, I would either go ker splat or realize I had a pocket knife and that I could cut the parachute bad open and save myself that way.

I would try to use one of my clothes as an improvised parachute and not die. xD

pull the emergency cord on the parachute and hope it would open...but if that didn't work I'd try to grab a bird flying by and hold on and see if it can support my weight

I like this idea!