OK, in canon, kid is running, falls down a good-sized staircase, is knocked out. It was a public place so help probably got to him fairly quickly, although he still goes into cardiac arrest from the blow to the head. At the end of the show, he's shown waking up and seems to be all right.
My question--what sort of long-term effects are we looking at here? Will he have trouble walking, moving, any future head problems? Headaches? Higher risk of anything? Will he need eventual surgeries?
(and I *know* some of you know what fandom this is right off the bat)