I was playing Invasion on Spire on the Elite Team on the final stage. I was taking the man-cannon up to the top of the Spire when I smack into the Spartan Team's Falcon on the way up. Somehow I manged to hijack the right gunner position from the enemy player and for whatever reason the left gunner position bails out shortly after this. So now it's just me and the enemy pilot high above the map. I'm on my headset asking my team for a way to kill this thing. They don't have any ideas. I was toying with the idea of bailing out and trying to hijack the pilot position, but I didn't think it'd work. 
 
In this situation, is there anything I could have done to kill the vehicle? (I don't care if I kill myself in the process.)

Sounds like a pretty awkward predicament. There's not much you can do other than lay down fire on the other team or bail out and try to stick the Falcon right before you fall.

Did you have a plasma pistol or grenade? If not, I doubt there was anything you could really do, although you could kill enemies from it until someone took you out.

Yeah, I don't think there was any way for you to kill it. Just chill inside shooting the enemy team, because if they try to kill you good chances are they'll just blow it up instead.