This one happened earlier today.
I was playing Battlefield 1943 as a scout, and I was holed up in a bunker on Iwo Jima. But what's this? There is a Japanese plane flying towards me rather quickly, nose first, firing its machine guns. I realise that he's going to pull up at the last second and bomb the area just outside the bunker, to kill the three of us that are inside it. Mortal men would have ran.
I fired.
And fired again.
And fired for a third time, when suddenly, the plane exploded into a mass of twisted, flaming metal.
I literally shouted "BOOM ************!" In triumph or surprise, I did not know.
Surely, I am the epitome of mature gamers.
In all seriousness, it was pretty much pure luck. Friendly planes must have roughed him up pretty badly first.