So I'm reading all of them Harry Potters again before the release of The Deathly Hallows and all that and I come across this funny line in The Prisoner Of Azkaban that I missed earlier.

...was still extremely nervous, and had only agreed to return to her job on condition that she was given extra protection. A bunch of surly security trolls had been hired to guard her. They paced the corridor in a menacing group, talking in grunts and comparing the size of their clubs.

Didn't expect JK Rowling to drop in a cool Freud symbolism just like that. heh.