Changed the oil tonight and learned how forcefully it comes out after removing the drain plug. I used a fancy 15qt collection container and the first stream of oil hit hard enough to splash over the side and form a 6" puddle. Reaching for the paper towels I caught my shoulder on some piece of metal. It was all pretty funny because I had just finished reading
this thread. Half a roll of paper towels later, the concrete looks pretty good.
[I ordered a crush washer but was shipped the wrong size. Oh well. The local parts counter was closed and my old washer still looked okay so I decided to reused it. Moral of the story is to double check your parts before starting.]