A Knife, Red Dripping

A knife, red dripping.
It reaches.
Grabbing you, then shaking.
Look here, it says,
Guess what I have done.
Touch my edge, my smiling edge.
Feel what I am made for.
The rug clings to your shoes.
It cries, Someone
Has stained my coat!
A piece of shirt lies choking and
Gagging.
The wall turns 'round,
Silently shaking its head.
Where's the body,
You ask knowingly.