But the pool-related injury that I do more often is slam the knuckles of my right hand (grip hand) on the metal strip that frames the outside edge of the rail on Gold Crowns. I'm so focused on keeping a level cue, and if I'm leaning over the table to reach for a shot, I won't notice it on my practice strokes how close my grip hand is to that metal strip, but when delivering the cue and following through -- thwack(!). It's not uncommon to scrape the skin off the index finger's knuckle, drawing blood.
-Sean