* TruthInTelevision. Normally, adrenal glands and the brain's limiters make it so that you only use around 20% of your muscles and maintain a thought of self-preservation. Putting a loved one, child, or sufficiently close friend of somebody in danger is the fastest way to see the brain release said limits and let adrenaline kick in. All thoughts of self-preservation (and everything else that makes shy, meek people shy and meek) are overridden, and it is quite likely that several dozen of your bones will be broken (if you are lucky) before they let up. People who manage to enter TranquilFury instead of all-out anger are even more dangerous.
* Buzz Aldrin did one of these! A conspiracy nut had been pestering him and other Apollo personnel, and he put up with that good-naturedly. But when said nut made an unfriendly move toward Aldrin's granddaughter, [[BadassGrandpa the 72-year-old astronaut]] [[CrowningMomentOfAwesome threw one punch and knocked the guy ass over teakettle]].
* [[http://badassoftheweek.com/wanyandie.html Tom Wanyandie]], a 78 year old Cree Indian wilderness guide who fought off a literal {{Mama Bear}} attacking his son while screaming every profanity of his native language.
** That story has {{Crowning Moment of Awesome}} written all over it.
* BruceLee was known for taking challenges from aspiring martial artists. During the making of ''EnterTheDragon'', a TooDumbToLive challenger snuck into their home and scared his two children, Brandon and Shannon. An enraged Lee put the idiot in the hospital with ''one kick.''
* [[http://archives.cnn.com/2001/US/07/19/shark.attack/ Vance Flosenzier]], who ''fought off a motherfucking shark'' when it was attacking his nephew. Not only did Flosenzier immobilize the shark and free his nephew, he then dragged it to shore so that park rangers could shoot it.
* Sun Quan, leader of the southern kingdom Wu during China's [[RomanceOfTheThreeKingdoms three kingdoms]] period. When Cao Pi declared himself emperor of the powerful northern kingdom of Wei, Sun Quan agreed to act as his vassal. But when Cao Pi requested that he send his son Sun Deng to the north as a hostage (and therefore a guarantee of loyalty), Sun Quan cut off relations with Wei, declared himself emperor of Wu, and told Cao Pi to bring it on.
** Quite sadly, Sun Quan eventually did outlive Sun Deng, who died of an illness. Based on some of his irrational and self-destructive decisions in the following years, it appears Sun Quan came noticeably unglued as a result.
* Supposedly professional wrestler Kensuke Sasaki actually adopted Katsuhiko Nakajima, who debuted in the business ''in his teens'', to act as this both in physical presence and through the Kensuke Office organization, which is essentially a "brand name" for their family (Kensuke Sasaki and his wife, female legend Akira Hokuto also have two biological sons) and affiliated wrestlers.
* Paparazzi don't bother JohnnyDepp's family at home. Why? Because he's told them in no uncertain terms that if he catches any of them sneaking around his home taking pictures of his kids, he'll bite their nose off.
** He once swung at a paparazzo with a piece of wood for trying to take pictures of partner Vanessa Paradis while she was pregnant with their daughter.
** Alec Baldwin once punched out a paparazzo for taking a picture of his infant daughter Ireland. [[AbusiveParents Too bad he didn't stay that way...]]
* [[http://www2.abc15.com/dpp/news/region_phoenix_metro/north_phoenix/Valley-dad-jumps-out-window,-shoots-man-attacking-daughter A man finds his daughter being choked by her ex. The father shoots the man in the groin.]]
* This Papa Wolf in Florida stormed onto a school bus to confront his daughter's bullies. [[http://www.wftv.com/news/25047891/detail.html Read more about it here.]]
* Jody Plauchet was abducted and raped by his karate instructor. Jody's father Gary planned for 10 days to kill his son's rapist and [[http://www.youtube.com/watch?v=Oi3Hyxuf5AE did so]] as he was being walked through an airport terminal. Despite a clear cut case of 1st degree murder Gary Plauchet only plead guilty to manslaughter and served 5 years probation.
* May 31, 2011, a bank robbery took place in Sarasota, Florida. As soon as the incident began, US Staff Sgt. Eddie Peoples placed himself between the robber and his young sons, then advised them to hide under some chairs and moved other chairs to cover them. Eventually the robber pointed his gun at one of the sons and said that if anyone tried anything, he'd shoot the kid. After the man left, Peoples followed him and used his own van to block the escape vehicle, then disabled the robber with hand-to-hand combat. In an interview with news sources, Peoples said "You don't threaten [[StealthPun people's]] children."
* [[http://abcnews.go.com/GMA/video/ohio-boy-falls-40-foot-dad-climbs-save-14044387 This]] Ohio man who, after hearing his three year old son's screams upon falling into a well more than 40 feet deep, scaled the well's walls down to the bottom to ensure that nothing bad would happen to his little boy before the fire department arrived.
* A man from Turkey saw his four-year-old son fall from a fifth story balcony and immediately ''jumped after him'' Pushing against the balcony to gain momentum, the man grabbed his son mid-fall, wrapped his arms around him and then turned his own body over so that he would hit the ground instead of his son. The child was left completely unharmed while the father suffered from a broken shoulder and ribs.
* A very dark example (crossing with KnightTemplarParent) is [[http://en.wikipedia.org/wiki/Vitaly_Kaloyev Vitaly Kaloyev]]. He was a grieving father whose wife (Svetlana) and children (Konstantin and Diana) died in [[http://en.wikipedia.org/wiki/Bashkirian_Airlines_Flight_2937 an horrible plane crash in Switzerland]], apparently caused by a "negligent" travel operator who was absolved by the law system. (See below for details) The mentally broken Kaloyev reacted via... searching for said operator with help of a private detective, and [[KnifeNut stabbing]] [[VigilanteExecution the one he blamed for everything to death]] two years later.
* [[http://tumblr.thedailywh.at/post/21716152875/kickass-dad-of-the-day-when-stuart-chaifetz Stuart Chaifetz]] was worried because his autistic child behaved oddly in school. He put a recorder in the kids's clothes and found out he was horribly bullied and abused by the staff. He's now on a crusade to protect all kids in such a terrible situation.
* YoshiyukiTomino is said to have given [[TheReasonYouSuckSpeech a SEVERE verbal/written lashing]] to some racist assholes who tried to shame the lady who played Loran in Anime/TurnAGundam, Creator/RomiPark, due to her Korean ancestry.
* [[http://austinist.com/2012/06/13/4_year_old_girl_allegedly_sexually.php A Texas man beats to death a man he finds about to do something best left unsaid to his 4 year old daughter.]] Charges will most likely ''not'' be filed against the father.
* A Chicago father held off the would-be kidnapper of his two-year-old daughter. [[http://news.yahoo.com/chicago-man-saves-daughter-abduction-attempt-211411557--abc-news-topstories.html Here.]]
* Israeli politician and current Minister of Foreign Affairs Avigdor Lieberman once clobbered a kid who was bullying his son, and threatened to do it again if he did it again. He wound up apologising and paying compensation.
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