I'm just curious

Many don't . Just depends on the Amount of damage, where it is , and what type ( trauma, chemical , or hypoxia) of injury and how quickly they got medical attention .

Its different for everyone.. Could be years (if ever) it depends on various factors

depends on injury. if in coma may be years or just few months

isn't that a sarcastic question?

I think its 3 days 4 hours and 27 minutes

Depends on how bad it was.

Depends