First of all, thanks for your service and be safe.
I got a couple of stories...even though it's not the same scenario you are asking about I wanted to share mine, too.
I have also been in a similar situation as another who replied, got open under my reserve at 300 feet. That time I was still trying of course but cutaway a little low and had a hard pull on my reserve. Finally got it pulled just in time.
Another time I got stuck in a downplane until about 1 second or so prior to impact. Nothing to do on that one, but my partner in the downplane got us both out of it at the last second by flipping himself to face up, twisted both my ankles badly but we lived!
The ground rush was VERY intense both times.
Both times I thought I was dead, both times I profoundly just said "Shit." I guess that surprised me since I'm a Christian I wouldn't have guessed my last word would be cussing, rather than praying.
In your scenario, I'd like to think I'd actually manage a quick prayer and find some peace at the end, but I really have no idea how I'd react. My thoughts might turn to my young kids I'd be leaving behind and that would be sooo hard for those last seconds.