Despite what anyone says, certain pitbull breeds, usually American Pitbull simply have a screw loose and can flip for no reason.
It's not coincidence they are over represented in attack stats - while there are a lot of breeds out there, pitbulls per head have by far the worst attack stats - check this out.
Between 1st September 1982 and 31st December 2014, there were 5460 attacks reported by the press in the U.S. Of these attacks, 593 resulted in death and 3285 in maiming (permanent disfigurement or loss of limb).
Attacks by police dogs, guard dogs or those trained for fight were excluded from the research as were dogs where no breed could be ascertained. Also, only dogs identified by designated animal control officers or other evident expertise were included to give data that is as clean as possible.
154 different breeds or mixed breeds were noted including 18 either purebred or mixed Pitbull breeds. Those 18 pitbull breeds were responsible for 3603 of the 5460 attacks, 308 deaths and 2225 maiming. Effectively, 11.6% of the present dog breeds (pitbull or pitbull cross) were responsible for 65.9% of all attacks, 51.9% of all deaths and 67% of all permanent disfigurement.
Yet we constantly hear, it's the owner, not the breed. In some cases, I'd say this is true but with figures like that, there is simply something about that breed that causes that behaviour.
"...sure beats doin' stuff."