BACKSTORY: From the Disneyland website:
“Jack Skellington, "Master of Scare-omonies," presents a pyrotechnics "skellabration" just for Guests of Mickey's Halloween Party! On select nights, the sky above Disneyland park erupts with ghostly visions, pumpkin-shaped sparkles, fiery bursts and thunderous sound effects set to a mischievous medley of high-spirited songs. Join in the "Halloween Scream-Along" and wake the dead! "