15. Professional Fighters
In most cases, the job of a professional fighter is to hurt his/her opponent so bad he/she can’t get up, win the fight and take the prize money. The only issue is, the opponent also has the same motives and so both sides are at risk. And because these are professionally trained athletes or fighters, they’re usually highly effective at hurting one another to an extent that they come out with bad bruises, swellings, broken jaws and in some cases, death.
While broken ribs and jaws are common, fighters get hit so many times in the head during their careers that their brains turn to some sort of jellies. This results to involuntary shakings, memory loss, slurred speech, paranoia and an overall decline in awareness.