The helmets were released from the property toward the stadium at which the game was held. Through computer-generated imagery, the helmets "land" at midfield through a live shot, and then explode. The "exploding helmets" gimmick was also utilized at various times within the 1980s and nineties over the pre-game tease. https://michiganfootball43219.pointblog.net/the-definitive-guide-to-queensland-football-club-68387968