Today, whilst scraping at a wooden cutting board in an effort to get it clean, I came upon a particularly stubborn bit of dried cheese. Scraping at it with increased vigour, I inadvertently wound up wedging said bit of dried cheese, which was unexpectedly sharp and hard, under the nail of my left middle finger, where it produced a surprisingly sharp pain.
As a result, my finger has been sore and throbbing all day. It hurts to type with it.
I injured myself with a shard of old, dry cheese.