1. They are what make your cell phones vibrate with a tiny but intensified magnet or harden a porcelain knife sharp enough to cut a steak.
2. Use the tip of a sharp knife to cut out the shapes of eyes, nose and mouth.
3. Slice with a large, very sharp knife and serve with whipped cream.
4. Sitting on an upturned bucket, a bald paunchy man cuts up lengths of tire into strips with a sharp knife.