Pure nostalgia, for me at least, the smell of freshly cut grass. Always reminds me of my grandfather and his beer after cutting the grass. Sweet memories.
Oh no, that is the worst. The healing and the changing of color, but as you say sure signs of recovery! I myself had a similar injury, I hurt something in my hand in the gym, and it has been three weeks I think that I have been unable to go back. Frustrating.
Anyways, have a splendid new week!