All Malcolm Fisher did was run over a badger. Unfortunately the badger turned out to be Ingolf, last of the giants. With his dying breath he reluctantly gave Malcolm two gifts of power and made him ruler of the world.
This is one of the funniest stand-alone fantasies I have ever read. Unlike some comedic fantasies, this one derives its giggles from the characters and the plot, not simplistic puns, making it even better.