This is a July 4th show done by two guys every year on the beach in Quonnie, Rhode Island. Each year it gets increasingly more elaborate, and now rivals a city hall show of a medium-sized municipality. They set off about 500 lbs of explosives this year in under five minutes (so it would be done before the cops showed up), so the entire show was basically one giant grand finale. The most intense part is around 1:20-2:05.