Ok, I'm a newbie to this camera so please bare with me. However, yesterday I was out taking pictures at a soccer game with the 7D and a 70-200MM IS L lens. I had the camera set to TV, auto ISO and high speed continuous shooting. Was having fun.. Somewhere between my first round of shots and the second the high speed mode quit working and would only shoot normal mode? Also, I've noticed that shooting indoors in high speed mode works some of the time only. I must be missing something?