It won't get caught by the crank, it can't. Think about it, it's either moving in the mass of oil as it sloshes around or sitting in the bottom of the pan. Once it settles to the bottom there isn't any force to lift it back up again into the oil and then past it into the crank. There is no possible way for the crank to get ahold of it. It's not like the crank acts as a pump, it just pushes the oil out of it's way.