Hehe.
Btw, have you guys played America's Army? In that game there's a fatigue/out-of-breath type of thing that occurs. When you sprint and then drop prone and try to take a shot with the sniper rifle, for example, for a short time, as you catch your breath, the crosshairs kind of wander around a little. It's a nice touch actually.
You read these stories of air combat in WWII and it's described as something very physically demanding. These guys were pulling bigtime Gs in planes they were were controlling by hand, often with no hydraulic boost or whatever on the controls, and it took a lot of strength. After a prolonged period of combat in this game it would be kind of cool to see little signs of fatigue come into play, a little sloppiness at the controls, maybe being unable to hold quite as many Gs in a turn or whatever.