I remember my neighbor getting badly burned by a sparkler when I was a kid - third degree burns to her hand when she grabbed what she thought was an unlit sparkler but had actually just extinguished.
"rarely in my life have i ever heard of a firework display injuring a crowd (scaring yes, injuring NO)."
The Vienna fireworks display shot into the crowd a few years ago:
http://www.washingtonpost.com/wp-dyn/content/article/2010/11/12/AR2010111206506.html
""It's nice to have some validation," Hollis, 39, said after the verdict. She suffered not only severe burns to her head, face, arms and torso, but also large, penetrating shrapnel wounds and lasting brain injury from a concussion wave that left "a lot of dead zones in Katy's head," as her attorney, Scott A. Surovell, put it.
Another suit is forthcoming for Hollis's younger son, who spent three days in a coma and also sustained burns and severe brain injury. The extent of damage to Max, now 7, is still being determined, Surovell said."