So I was playing in a free-mode lobby and there was a guy trolling people with the Hydra. I was flying a Buzzard at the time and decided to play a little game.
I went over near the Humane labs by the coast where there is that large cave. Having explored it before, I know that the Buzzard fits in there just fine. So I slowly hover in and wait. Sure enough, a Player-Helicopter icon on the map was too tempting for this Hydra pilot and so he starts flying towards me. The hilarious part is that he didn't understand that I was "underground" and I could hear and see him on radar doing a couple of cannon runs at the ground above me.
After the 3rd or 4th run, he finally figured out where I was and slowly hovered down towards the opening of the cave. I hit him with 1 missile and then just blasted the miniguns at his Hydra. I'm not sure if it was directly because of my deluge of munitions or a mistake on his part, but his plane was quickly in the sea and him quite dead, with my Buzzard completely unharmed. He respawned and took a couple shots at me with a sniper beyond my useful range, so I left the cave and flew away to pursue a bounty....