On the level Exodus, in the end where you see the Wraith, shoot the alien in the turret (the turret alien should be weak, for example a Grunt).

Then get on the Wraith and when it says "Board Wraith" - don't!

Instead go up and it should say "Operate Wraith turret". Operate it.

The brute driving should jump out and you get out of the turret kill him.

Then the Wraith should be driveable with no damage!