For me, it wouldn't matter the opponent. My sole purpose would be to outscore him. Smack-down would be to either have a 50+ pin advantage in the 10th frame, or throwing a 300 game on them. I take that attitude when I bowl my friends as well, in my mind whenever I'm bowling, I'm going for a 300. It's pressure but I think it helps with concentration, at least for me.
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"You keep doing what you have to do until you're called to do what it is you were meant to do."