 They chided me as they proceeded to win the game. I saw evidence of overconfidence that can come with success, along with a few other things that I won't comment on here. Optimism is a very powerful thing. It sets in when everything is going very well. It causes us to become exuberant. When we become exuberant, we begin to take chances that we would normally not have taken. Why do we begin to take risky chances?