Talk:Melee Weapons/@comment-209.128.31.118-20121124093305/@comment-94.168.190.28-20121124104501

If the body armour is made of a ferromagnetic metal then a magnet would be attracted to it. If the magnet is powerful enough the force would be considerable, slamming the blade into the armour with more force than a man could move it. The electromagnet part can act just as on on-off switch so that you only activate it just before impact, making sure it moves towards your enemy, not yourself.

Much of the science here is nonsense, but this makes vague sense.