I subscribe to a group called "The Digital Photography School". It's a place where people can learn about photography and many of the people that hang out on the forums there are pretty nice. One of those people really helped me with my sports photography.
Anyway, every Thursday they send out an e-mail where they give some handy photography tips. One of them was about modes that aren't often used on a camera. One of these modes is where you can adjust the intensity of your flash. So tonight I had to try it out.