When you destroy an enemy in dogfight the replay button shows up, if you press the share replay or whatever button, and you watch the replay you see your plane firing at the enemy until one bullet or missile hits, then the replay ends without the explosion because the replay is stopped when a bucket or missile touches the enemy, and this means we can't really share dogfight replays, even if we wanted to, not sue if anyone else has found this, tho,
it may even happen on the other missions like races, although in that it wouldn't really matter, it should carry on recording until you push the view replay button, then it should stop, not when the enemy first gets damaged otherwise a lot of awesome kills will not be captured on film!