WHAT SPOONS ARE YOU USING MAN?
(you would need a diamond spoon).
Also, aren't they powered by nuclear reactors?
1. Can easily blow up if you know what to do (even Jeremy Clarkson hitting it with a hammer would probably eventually do it)
2. Have the radioactive acid? Like the stuff that Bond kills Doctor No in in that old bond movie?
Also they are very re-enforced. They can survive planes full of bombs hitting the arse of them intact and still funtional for battle