How do you knock someone out with just one punch?

Yeah, how do you? What part of the face can you knock someone out with just one punch? Just the face though, not at the back of the head, not the body, but in the face. I know you have to be very strong to knock someone out anywhere in the face, but what specific spot can you knock someone out even if you weren't strong like maybe average strong.|||Someone? Who? Some you can knock out easy, some you can not knock out. Depend on who you fight.|||Either under the chin (uppercut), or on the temples (which requires surprisingly little effort) - and a mouthpiece is to protect you teeth %26amp; tongue, not to prevent concussion (in fact: it's a 'mini concussion' - or at least your brain slamming against the inside of your skull that causes a knock out...)|||To tel you the truth, most people aim for the face, but you wanna know where you can knock some down, and out...right above they rib cage, youtube the fight against delahoya and hpkins,...thats a perfect example!...GOOD LUCK!|||On the side of the jaw. Imagine the person wearing a goatee and strike on the edge of the chin right on the edge of the goatee. A slight uppercut may be necessary to hit the nerves correctly.|||I would say on the side of the face/chin area....I hear thats the sweet spot.|||ON the side of the jaw. It's easier if their mouth is running when you do it.|||On the chin!|||chin...thats why people wear a mouth piece to prevent concussions and getting knocked out.