and pray I land on a haystack!!
More likely on top of your wrecked aeroplane!
Well i've heard of parachute jumpers with failed parachutes surviving 10,000ft falls! It's unlikely but could happen!
That is true, but I suspect the difference is to do with the surface that they land on.....trees for example may be more cushioning than rock!
Staying with the aircraft will at least give you some decent crumple zones if you're lucky to hit right......
This is why I said I'd stay with the aircraft......it's also possible you might have a little bit of control left too, which could help you.