Hi guys! In my story, the main character winds up in a car accident (as a passenger in the backseat) that ultimately forces him to stay at the hospital for around three weeks to a month. My main questions are: What sort of injuries would force him to stay at the hospital for that length of time? Is it realistic for him to sustain a head injury that renders him unconscious/comatose for a day or two? What would be the long-term physical/psychological effects of such injuries? How would he go about any necessary follow-up procedures? Any and all help would be appreciated!