Terry Pratchett said this quote

“ Granny Weatherwax had a primal snore. It had never been tamed. No one had ever had to sleep next to it, to curb its wilder excesses by means of a kick, a prod in the small of the back, or a pillow used as a bludgeon. It had had years in a lonely bedroom to perfect the knark, the graaah, and the gnoc, gnoc, gnoc unimpeded by the nudges, jabs, and occasional attempts at murder that usually moderate the snore impulse over time ”