system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What happens when someone goes into a coma? What wakes them up? And how can it last from days to decades?
gpt
- Your brain basically go into "sleep" mode just like a computer. Most times you go into coma so your body can progressionally repair itself.

- There is a lot of variables that can wake a person up from coma, but normally you're in a safe place like a hospital, where your brain will eventually "start" your functions/body again.

- Depending on the damages on the brain itself or body it can last longer or shorter. 


TL:DR Humans are computers more or less, Coma is for a human, as sleep mode is for a computer.