The Ninja Epidemic

You knock on the door and wait for what seems an eternity for your neighbors to answer. Out of the corner of your eye you notice that shadows are moving closer to you, darting out from behind trees, shrubs, and vehicles. You knock again, so hard that you swear you feel the door crack a bit, so loud that it echoes throughout the neighborhood like thunder.

The door creaks open and you barge your way in past your elderly neighbor, slamming the door shut behind you. Mr Wilkins looks at you startled, angry, and confused at the same time.

"You listen to me, youngster..." He begins. But before he can finish his statement the door shatters to splinters and he is cut to ribbons of flesh in a matter of seconds. Blood flies every where, coating you and everything around in a scarlet red. You fight the urge to throw up.

The ninja soon realises that he has cut up the wrong person and his eyes meet yours. He begins walking slowly towards you, his sword before him, prepared to strike down upon you with an almost certainly painful death.

At this moment your options are pretty limited. You can face the enemy or you can flee. What do you do?