I have never been in a situation where I needed to go into full survival mode. On the other hand except when asleep I'm never fully out of it either. Even asleep I react fast to full awake if something unusual happens.

But when out and about in the wilds I have been in situations that could easily become very sticky in a very big hurry. But because of good or maybe lucky planing. Things never got to the point that I really concidered it a survival situation.

Not that I know every thing as I'm still learning. But so far I have guessed right.