You can hardly see this one, but it's there. A little diagonal ribbon that's just over a centimetre long.
This tiny memento was caused by a cat, and not just any cat, it was my mate Dave's handsome pet Burmese Alexander. He was a constant attention seeker, but on this particular afternoon I guess he just wasn't in the mood for it. As I picked him up, he started squirming around in my grasp, and started kicking back paws. One of them caught me on the wrist, which cut me, almost opening up a vein, and I just had to let him go.
Dave thought it was pretty amusing at the time. I sure as hell didn't.