OK. Five days ago I managed to bash my elbow on the corner of the mantlepiece in my bedroom while swinging down from my bed. Because I have one of those high beds on stilts with space underneath.
This is the vicious corner in question:

Admittedly, not all of the dust was cleared by my elbow. I did also wipe the corner afterwards.
When I found this task the next day, I tried taking photos of my hideous injury (OK it isn't that big, but it hurts a lot when I lean on it wrong).
However, I found that your elbow isn't the easiest part of your body to photograph. As a result, many of these just appear as a kind of red blur on my skin.

1 day after injury:


2 days after injury:


3 days after injury. This photo is the worst of the lot. If you look you can see the scab in the shadowed area:


5 days after injury. Finally this moring I managed to get a photo with decent lighting. it is still a bit blurred but you can see more clearly that it is a scab on my elbow, especially as my skin looks so pale:


When I first injured myself i had continual pain in my elbow for about 20 minutes. It bled a bit, but not too much, and a bruise surrounded the area. If I had known about this task then, I would have got a photo about an hour or so after the injury.
Now, 5 days later, a scab has formed and there is less bruising. it doesn't hurt as much when I lean on it, and that is the only time I feel pain from it.

I have now learned to be more careful when swinging myself out of bed, but I can guarentee that I will hurt myself doing this again in the future. Because after a while, I'll forget to be careful.