Based on the video below, it's possible to blow up the cart with the helicopter while the plane with Allen O'Neil is touching it. This will leave his ship with 1 HP. You can find it around time 10:10 http://tvpot.daum.net/v/v0945GZGXfcorllxlIGlZZY

In order for this to happen, the place needs to be low to the ground, and launch a missile as it's first action, or backup up really fast. This will allow you to blow up the car with the helicopter while dealing a large amount of damage to the plane.

There is a possibility that the plane's hitbox clips inside the car while it explodes, but further tests are required.

I have attempted to replicate it and have only succeeded once so far.

Jackafur did it on actual hardware.