A Khadoran friend of mine was playing Karchev, went for the assassination run with the Tow and fishtail combo, and couldn't kill the other caster. With Karchev's back arc exposed, he forefitted the game. He caught some flak for doing this rather than playing to completion.
To commemorate this, we devised the Karchev Escape Pod. When Karchev is left with his back arc to the enemy, he just pops out the front of his 'jack body with this little one and scurries away! He needs to find a medic and a mechanik in the next twelve minutes or he will die.
Made with a Karchev Torso, Halfjack arms and legs, the boiler from a Rhulic Light, and a bunch of 40k bits I had lying around.