Stephen King's It is one of the greatest horror films ever made and its villain, Pennywise the Clown played by Tim "Freaky Voice" Curr, is one of the most recognizable. The Pennywise Clown Mask is instantly recognizable as the icon of horror movies that it is. Plus, even if people don't get it, it's a murderous, insane clown made out of pure fear and subconscious angst. That's something people understand implicitly. And you don't need to ask Randall Flagg or the Crimson King to know that clowns are scary as hell. It's just common sense.
The Pennywise Clown Mask is the pitch perfect re-creation of the hideous clown from the film It adapted from Stephen King. If you hate clowns and/or love freaking people out, this mask is the way to go.