This has not happened but to me personally, but...
Pitch is low, batter tries to check swing, PU calls Ball. Pitch touches ground and gets by F2 and rolls to backstop. When F2 gets back to plate area, F2 appeals the check swing. PU says, "YES!". F2 tags B. Here comes OC.
All I can think of is "too sad, too bad". Even with 10.C.3.
Just askin'...
