Basically, you can go up to a friend and slowly (Like I mean very slowly) drag their limp body for a short distance to maybe move them out of gunfire. Doing this unequips all of your things and makes you very slow obviously. This is so maybe combative teams like SD can move their friends to more safer areas for CSU to treat them. Or even for CDs if they have their fellow inmate downed in front of all of that gunfire.