Keep in mind that you will often be shooting under banks of flourescent lights in the arena. They blink 120 times per second. A shutter speed faster than 1/60 will sometimes catch them on and at other times catch them off. This will drive you absolutely nutzo. If you are very lucky, you will find that the maintenance crew has been trained in properly mounting the bulbs and will have half of them installed left-to-right and the other ones installed right-to-left.

Pops