This pin features the Thunder Mountain Boom only from the Walt Disney World Mascot-themed mystery pack. The pin features the Big Thunder Mountain Railroad train in front of the mountain above the name. Each pack contains 5 randomly selected pins. There are 16 pins total in the set. Two different Disney Mascot Mystery pin sets (of 16 pins each) were released: One at DLR and one at WDW. They are inspired by artwork from March Magic 2015, which created teams and mascots based on different DLR and WDW attractions. Pins in the WDW set (#115854): 115672, 115673, 115674, 115675, 115676, 115811, 115812, 115813, 115841, 115842, 115843, 115845, 115850, 115851, 115852, 115853.