That 2nd penalty in the same game is a tough one.
Listening to penalty kick takers in the past; they talk, most of them, about how they make their mind up well in advance before the match about where they are going to send the ball. Which direction, how high, how much power. It is all pre-determined. So then there is no decision making in the moment, just execution. No getting lost in your thoughts, lost in indecision. Pure action. You know what you are going to do and you go out and do it.
That 2nd penalty though ... and they talk about this too. That 2nd penalty is not planned for. They have no decision made about prior to the game of what they will do with a 2nd penalty. There is a bit of panic. Do I do the same thing? Do I go the same direction? Or does the keeper know what I want to do? Do I have to do something different? Or will the keeper be expecting me to go the other side since I went the left last time?
There is overthinking. There is indecision. There is panic. This is not execution of a pre-determined tactic. And these guys are great penalty kickers! The guys who regularly take penalties for their teams. This is how they operate and what they experience when asked to take a 2nd penalty same match.
This is why I always get nervous when I see the same penalty kicker for the 2nd time in a match. You have all this added angst that does not exist with the 1st penalty. Oftentimes you are just better off letting someone else take the penalty rather than taking the 2nd one yourself. Step aside and let someone else do it.