If you throw the plane backwards and give the game a litlle time it will resume and tell you that you stalled, and if you have an emergency booster you'll see something cool :)
Did anyone know that the 303rd squadron didn't have a single british pilot in it ? I was wondering why did the author choose the "303" and I read that it was s polish squadron in the RAF ranks, and trust me after reading about their acomplishments I can say one thing... those Poles where a bunch of badass pilots whom the enemy was afraid to meet in the air...