3 years ago I had something weird happen and I came round on the driveway with a bust knee and my son next to me where I had dropped him.
I was in a huge amount of pain, especially when I breathed in and I couldn't drive for a while.
Sometimes when I laugh, or for apparent reason, I will get excrutiating pain in the area of my pleuretic muscle. I have to breathe through the pain and it takes a while to go. I am then left with an ache.