Actually I didn't, but I thought I did. While changing the back plugs on my horrid Ford van, I bruised the short rib on my right side. At first I thought it was a muscle, then I thought I had exploded my liver, then I realized it was my rib.
I was told three to six weeks until it heals. I actually had to wrap tape all the way around me.
It's pretty excruciating. You don't want it to happen to you. Ooch! Ooch! Ouch! Ouch!