First off, unload and show clear isn't a race. I never cover the ejection port when unloading and showing clear. It's not often but your ejector could hit primer and mess your hand up when it goes boom! Some people don't want the round to hit the ground but it's only a few cents wasted if you can't recover it and it's not worth the flip and catch and risk a DQ or taking your focus away from making your gun safe. Ultimately it's your responsibility to have a clear gun so I always visually check chamber after unloading and before, hammer down, holster command. It takes an extra 1/2 second and ensures I can remain shooting for the rest of the day.