The Walt Disney World Resort has marked several 40-year milestones this month, including the debut of Magic Kingdom Park, Disney’s Contemporary Resort, Disney’s Polynesian Resort and the Electrical Water Pageant.

Another 40-year milestone that was marked this week was the anniversary of the first fireworks display ever launched at Walt Disney World Resort. The Fantasy in the Sky Spectacular took place in celebration of the dedication of the Polynesian Village Hotel (now Disney’s Polynesian Resort) on Oct. 24, 1971.

In this clip, Principal Fireworks & Special Effects Designer Brad Cicotti shares the history of Disney fireworks and offers a backstage look at how these shows are launched each night.