This episode pulls off a neat trick. With Donna being present and her comedic interactions with the Winchesters the episode is quite funny. At the same time, the plot is quite dark-it touches on vigilante violence, child abuse. And the trappings of the masks gives the episode an unnerving vibe. The two tones should be a muddled mess but by small moments-Donna being upset about the innocents lost-and small choices sell the episode.