It sounds impossible but its true. In a save recently created by sporefan360, when you shoot the METL with the STKM when he's right beside the metal, it will spark the metal, and if he's close enough, it will almost instantly kill him.
STKM actually sparks the metal if his head is inside the metal. @Dragonfree97 QRTZ at 0 Kelvin is so brittle that any movement will break it, so it's hooked up to a detector that blasts the C-5.