"Yup, seems to be a combination of filming and any kind of enemy fire. In every CTD i was filming and under fire by either ack or buff guns."
It'll be interesting to see the bomber kill stats for this tour - there must have been lots of grateful bomber pilots, under attack from enemy planes, who were saved from certain death when the enemy planes vanished into thin air.
Or perhaps the bomber guns and ack have been beefed up, so that they can not only shoot down your plane, they can shoot you straight out of Aces High and make you reboot your computer!