Sorry to hear the gravity of your lad's injuries, Old Mrs S. Hope the hobbling will soon pass!
BOFH = Bas***d (add, in any order you feel appropriate, the letters r, t & a) Operator From Hell and derives from a comic series of articles in the computer press several years ago about life as an IT system operator - the guy who spent many hours (as they used to that long ago) sitting in the room with the computers changing disk units, feeding punched tape or cards in,retrieving printout and putting it in the racks for the users, and sorting out problems with the users' terminals. Ah, them were t' days. All the 'screens' ran from a single computer, living in its own air conditionned room, locked away from all but the BOFHs who thus had total control over who could do what and when with their computer!
HTH!