Wow, this is something you don’t see everyday, in honor of the release of “Harry Potter and the Deathly Hallows: Part 1,” a carillonneur performs John Williams’s hypnotic “Hedwig’s Theme” on the clavier keyboard inside the Centennial Carillon Bell Tower at BYU. I’m not sure what I’m blown away with. Whether by how good it sounds or the nerdgasm BYU had while doing this.