But what I didn't know at the time, nor the Doc at the ER, my tendon was actually sliced with only a speck holding on. The remainder snapped a couple days later and I had to have surgery and months of physical therapy to be able to use it again.
I was actually surprised it didn't hurt more, so I mean it when I say your bruise looks pretty ouchy. A slam with a fingernail involved is no fun at all!