Sometimes, but not always, it's a lack of concentration.
A couple of months ago I was playing eight-ball on a bar box in this little place where all the barmaids were topless.
I was standing there, waiting my turn to shoot, when one of the girls walks up from behind me, presses herself against my backside, and whispers in my ear, "Would you like something to drink?"
Well, as you know, if there's one thing that really turns my stomach it's bare tits on my back, so I spin around and stutter, "I'll have a Slippery Nipple." She gives me an odd look and walks away.
Needless to say, I was so taken aback by the whole experience I couldn't shoot a lick for the rest of the night.
I think concentration is very important when playing pool. :smile: