If I have one more spectator come up and ask me, "Do ya' need a light?", I'm going to vomit.
I love when police come into the show site and ask, "can I play with the fireworks?" To which I reply "sure...can I play with your firearm?" (...they usually leave quickly, at that point)
Press persons asking "What's the worst thing that could happen during this display?"
Sunburn...enough said about that
Shooters, who are a little too "INTO" fireworks...

Realizing, during a setup, that you are going to have to load far more shells than you had wanted to.
Sudden cloudbursts, and you're not quite as ready as you hoped!
Hand firing a display, during a New York winter, falling into a snowbank and extingushing the road flare.
Loading equipment onto a barge, for a water show, and going for surprise swim.
Let's hear some of your thoughts...
