Here is a link to Bongi's interesting post about swearing in the OR. It involved his professor, the operating surgeon, a couple of bladders, a ureter..oh and the swearing. I'm not sure I would've wanted that surgeon attaching my ureter to my bladder because of all the mistakes he was making and having to do over.
Although... I do think a surgeon should do whatever they need to do to keep them on their game and get them through it...successfully. :)