A real sword is a fearsome weapon but most people treat them as jokes. If this kid was using a crappy cast bladed pseudo sword, and was untrained, you can imagine the damage that can be done with a real sword in the hands of someone who knows how to use one.
I am curious on the kind of blade he used, from a forensic poinit of view. To use a sword to kill and cut, you have to be really quite dedicated to follow through. I wonder what had set this untrained kid off to be able to actually do it. I am sure there is a lot more to this story.
Was the international student boffing Mom or something?
Of course if somebody is coming at you with a sword he is immediately seven feet tall and the sword ten feet long. Later you are surprised by how they shrunk. :)
Still even if it was a three foot with a bit of an edge you could still do a lot of damage if you had the element of surprise on your side.