Yes, I know what you guys mean. I was playing the first mission of the campaign and I could not concentrate because I was also busy with something else, I did shoot down a couple of bombers, though. Then I heard someone scream that the enemy bombers were coming through and that they're going to bomb the harbour if we don't do anything fast. I hurried to the harbour only to find out a crowd of bailed out pilots on chutes (??) and hardly any bombers.
I was like... where did they go? Were they shot down by AAA guns, or wingmen? I mean, is there any way to actually FAIL the mission? I do hope there is because I don't want the game to play itself, you know.
As for being shot down, I was at least once. The canopy was all like swiss cheese and the controlls no longer worked. I wanted to find an airstrip to land but went into an unrecoverable spin close to the ground. Splash.