Vernon Dursley refused to allow Harry to go to Hogwarts and insulted Albus Dumbledore. Hagrid turned a shade of red and bent his gun in half. Petunia did not say anything but shrieked when Hagrid took a seat in their living room. Vernon said another insulting thing, and somehow Dudley had wound up with a pig’s tail. Hagrid was also quite enraged when he discovered that the Dursleys had told Harry that James and Lily had died in a car crash.