That Doesn't Look Right

In what can only be described as a freak accident (adjusting a tubular bandage on my knee under the table on the train) I somehow managed to dislocate the tip of my finger.

No pain when it happened but it's kind of hanging at a funny angle when I relax it. I can straighten it without pain, so I've got it in a temporary lolly stick splint til the morning, then if it's still looking dodgy then I might have to wander down to the local Minor Injuries Unit...