I've heard amazing stories but sadly it's difficult to know what is real and what is not, especially afterwards when people themselves might be a bit confused of what had happened.
But I've noticed that in some cases we really can do things we normally can't when we are in a dangerous situation. I've felt faster and stronger in situations which seemed dangerous, but I'm not sure if it was just a feeling or real.
It'd be nice to know what is the thing which makes parents so much faster and aware when their children are falling down from all the dangerous places. I suck as things like being a soccer goalie, but when my son was younger and about to fall down from somewhere, I was freaking fast to react.
Maybe it's... Dadrenaline.
Dadrenaline is totally a thing