The AdAmAn club climbs Pikes Peak each year and sets off fireworks at midnight. They weren't visible last night due to clouds. http://adaman.org/
And by pretty cool I mean it's pretty fucking awesome. I suppose this has to be synchronized with computers.
How would they practice such a thing. Simulations maybe. Gonna have to look into it. Last year's cost over 2 million bucks and it was 11 mins.