Went with my kids to Monster Jam for a Cub Scouts outing. I don't exactly have the gear for sports shooting in a nearly dark stadium, so it was pretty much spray and pray.
XSi 50/1.4 & 430EXII (that nearly melted)
It was dark, smoky, and everything was moving fast. My poor 430EXII was doing full pops all night long, changed batteries twice, both times they were almost too hot to touch, and the flash was starting to get a funny smell. At least I didn't let the magic smoke out
But even then, the flash was only firing for every 5-6th shot, and out of 1700, only about half were properly exposed. Of those, my panning was only close enough on about a quarter of them, and out of THOSE only about half were well composed/interesting. (thats about 100 left for those following along with the math)