Fireworks?

I was just informed by the ATF (alcohol, tobacco and firearms) that I'm licensed to buy fireworks. Huh? Last summer we worked on a pyrotechnic crew over the 4th of July and had to get all kinds of clearance from multiple government agencies...evidently in the process I guess I applied to be licensed AND WAS APPROVED (LOL). Don't look for any big boomers going off over the studio anytime soon...handling even the 5' shells makes me a bit nerveous...working with a pro crew was fun but I think I'll leave the big stuff to someone else...I'll just take pictures of it.