Applying game theory, might it be worth the keeper randomly not moving for one out of five, but with the striker having no idea which one? This means the Pirlo pen would probably fail once in every 5.
Well it would only be one in five if every penalty taker chose to chip it down the middle too. Which they wouldn't.
I actually think that it is brilliant that Pirlo, having had one of those penalties saved, still does one in a Euro QF.
The thing is though, we have two examples of him taking this type of penalty, seven years apart and in a friendly and a glorified friendly. We have no examples as yet of him doing this in a significant game.
If you were the guy who was compiling a video for Joe Hart of Pirlo's penalty taking preferences, you would only draw on examples from proper competitive games surely?