17:20 01/5/2025 (SOUND)Hydrogen balloon explodes during Chinese New Year event 0 (0) -5 +5 It is said that the explosion occurred when hydrogen gas was used because helium was expensive. How useful was this post? Click on a star to rate it! Submit Rating Average rating 0 / 5. Vote count: 0 No votes so far! Be the first to rate this post.