In the first level of the game, when Cat and Emile are getting on their Falcon, you can destroy it. :v It takes normal damage but my favorite way is to ride on top of it, charging my plasma pistol and shooting it so the Falcon drops into the kill zone. If Emil and Cat hit the bottom of the killzone, they respawn by the haystacks where the Falcon was going to pick them up. If you destroy (or flip it upside down) it where it lands, or in any walkable area, you can snag an invis marine's Magnum with 20 rounds in it. Sadly, if you flip it over and have the marine fall out, you still can't pilot it. The best part, when Cat and Emile are back at the haystacks, you can take that civilian vehicle and have Emile drive passenger-side instead of Carter. A lot of good a shotgun-shooting passenger does, but still. :v Now you can have even more cannon fodder! Not really, though. He just poofs out as soon as you hit the checkpoint. Sadly, Cat refuses to come with you... so I ran her over a few times. Nobody likes her anyway. You cannot shoot down Jun's chopper.
Actually, you can shoot down Jun's Falcon. I Plasma-Pistoled it a few times, flipped it, got the pilot out, and loaded myself up with Noble team and a few troopers. However, since that was the Falcon you use to fly to the communications outpost, I couldn't finish the mission.
That was crazy rape-face when you got in. xD THAT'S the one I want.. the one Cat and Emille got into was weak-ass an undrivable. D:
Ah but that is where youre wrong. At a specific point in the mission, just after you get into the civilian vehicle, you can EMP Juns falcon. Once you get into it, you can fly around. Then, if you fly on through the level, you get to a part where a Spirit drops some grunts down. You can get the Falcon stuck inside the Spirit and it drags you out of the map. Once outside, if you fly out to a certain area, the level spawns the Communications outpost and despawns the rest of the level, allowing you to finish the level with the Falcon.