I am fond of military aviation, but I believe there are several errors in this movie. It is not clear what time period shoud this be, but since it depicts German fighters over Britain, it looks like it's during the Battle of Britain, and at that time period Spitfires had small caliber machine guns which couldn't have possibly chopped a Messerschmitt's wing off. With the one wing of both aircraft broken in half, they couldn't have landed on their fuselages like that, they would have immediately spinned around and crashed. Military pilots shared mutual respect for each other, also they needed to be cold-blooded people, and it is not likely that they would have chased each other with rage and shooting to kill like that. But interesting short movie anyway.
Ok, I understand they wanted more dramatization in this short movie because it needed to be intense. To sacrifice your wing in order to clip the other plane's wing at that low altitude, at which you don't have the time to bail out with your parachute safely, would be a suicidal idea. More reasonable thing to do would be to try to cut the enemy's tail by your propeller. That way, you would have made your enemy lose his aircraft's controls and crash into the ground, and you would have probably destroyed your propeller, but still have had both your wings left intact in order to try to land on your fuselage. But to collide at that low altitude, then to start rolling uncontrollably, and finaly both aircraft to land perfectly safely on their fuselages, ha ha, not even in a wildest dream. Anyway, you have inspired me to use again my Microsoft Combat Flight Simulator 3 after a long time, although it's a bit crappy and old, but still good enough to have some fun shooting some enemies down, lol.