Jack Sullivan is the leader of his group of friends. He is with them at the mall, attempting to catalog monsters for their bestiary. The group includes Quint Baker, Jack’s best friend and the brains of the operation; Dirk Savage, former bully turned friend and the muscle of the group; and June Del Toro, Jack’s love interest who is strong, independent, and has no desire to be rescued by any of the boys.

While attempting to fill out their bestiary, the group is attacked by the Wormungulous—a train-sized beast that chases them throughout the mall attempting to eat them. The friends split up in an effort to escape, but Quint goes in the same direction as Jack, which attracts the attention of the Wormungulous. Jack uses the BOOMerang—a traditional boomerang with smoke bombs and sparklers attached to it that Quint has designed—to distract the monster.

While the BOOMerang doesn’t return like a typical boomerang should, it smacks the Wormungulous in the face, creating a series of smoke bomb and sparkler explosions. This causes it to smash into an elevator, and in the ensuing confusing, Jack and Quint hide in a nearby store.