In need of medical information about certain situations (for a comic)

(Sorry this is a bit long) I’m trying to create a comic, and I want it to be realistic(story wise). So I have a few questions:
1. Does moving the body of a person in a coma constantly, stop muscle fatigue from occurring? If not, is there a way stop muscle fatigue from happening or at least lesses the affects?
2. How do people in coma’s eat? Do they use feeding tubes, or IVs that give them the vitamins and nutrients they need? (I’m sorry, I’m not educated in that kinda thing ;w;)
3. (This kinda stems from question 2) If the patient were to wake up and take out what they were feeding or taking nutrients from, what would be the damage? How badly can they get hurt? How dangerous is it?
4. (This is more of a sciency question) What are some things that have a highly explosive reactions when they come in contact with a certain liquid?