I totally know this is not the best question for here because it goes beyond just fitness-y stuff and into all of that science stuff more so, but let's consider I am asking this is a good-hearted, simple way:
Middle-aged woman; doesn't exercise really; has three kids; probably couldn't lift even 200 lbs. on the deadlift on any normal day, even with full force.
One day, her child is trapped under the back, rear-bumper of a small car, and she somehow lifts it enough to save the baby. Even disregarding the fact that the car is small, most U.S. cars that are small still weigh over 1,800 lbs. most of the time.
With that in mind, it would most certainly take over 200 lbs. of force to lift one rear-side of a bumper. Why can she do this?
Why can some people gain this superhuman strength, and what can simply explain it for one like me who is interested in the power world more?
Also, if this superhuman strength can just appear and help a person lift something they couldn't normally lift, couldn't this superhuman strength be trained to be applied to more common use, possibly?