Bruise, next day

To get into my workplace, you need to go up two steps to get to the front door.
I was on the first step and about to step onto the next one, when my knee suddenly gave out and I started to fall. I was worried about snapping my leg on the step under me, so threw myself forward but didn't have time to hold out my hands.
I cracked my kneecap on the top step and smacked the door with my hands and head!
The cleaner answered the door, thinking I'd knocked on it and opened it to find me trying to get myself up.

When I first did it, I thought I'd broken my kneecap because I couldn't feel anything below my knee but the feeling came back (which made me wish it didn't).

This was taken the day after.
As you can see, I also managed to slice my leg while shaving it. -_-