He just doesn't have faith in his ball striking ability, it all comes back to that.
There will be nerves as a result of the pressure of the kick, of the moment, but if you're confident in your ability that's all there will be, and you'll probably handle it - as most of the players tonight did. If you're not then there's a mountain load of fear pressing down on you, knowing you can't pick a spot and hit it there.
I've had the situation a few different times in a few different sports myself, and I've seen it a million times in team mates or fellow competitors. If you know you can do something you are much more likely to to do it under pressure, if you're trying to wing it, all the 'confidence' in the world won't stop you from bricking it when the moment comes.
I've wilted a couple of times and I've pulled a few really good things off a few times. And it's always linked to my underlying ability at something and my belief in my ability to do it. I think you'd find most pros who face the sort of pressure I have no experience of at all, would tell you much the same.
Proficiency at something is worth more than all the bravado in the world.