Some people are at their best when the game is on the line. Some have seen it all and do not get rattled. Some are like coaches on the floor. Some have fun out there no matter what happens. This guy has infectous enthusiasm for the game.
I would rather have a good shooter with great confidence take a game winning shot, than a great shooter with average confidence take the shot.
I have a brother like that. We used to get the family together a few times a year and do some drinking. Around 0300 he would announce that he could jump rope 250 times without a miss, or swim 6 laps of the backyard swimming pool under water. We would lay $100 on the table. Once it was about $220. He never lost a bet. Didn't matter how drunk he got.