US Open Final or the Thursday night bar tourney in the next town over, it doesn't matter. The person involved will feel pressure. So, you are hill/hill down to the last ball and its a 50/50 shot. What are you thinking about? Do I go for it or do I play safe? Why wont my hands stop shaking? God, I wish I didn't eat that chilli last night? Crap, I forgot to buy my wife a card for her birthday tomorrow!?
I'm always interested in another persons thought process when they are in a difficult position at the table.
Personally if its 50/50 and the last ball all I'm thinking is I'm going for it. Once I've made up my mind that I'm going for it whether its 90/10 or 10/90 then my thinking switches to "I'm potting this ball". I say that over and over in my head until I've hit the cue ball. Then I either say "knew I was going to make it" or "@$&*%@#&#". I think the most important part for me is believing im going to make the shot. If for one second I thought I was going to miss I'd never make a ball.
Max Eberle once told me the best thought under pressure is no thought at all.