My personal favorite was the tech that must have slipped through the cracks on the "how to stick a needle in to draw blood" portion of training.

I've got pretty prominent veins, and did even moreso then with as much heavy weight training and running I was doing. Well, she stuck that needle in and missed 3 times... the 4th time just started digging around. I've got a pretty solid stomach, so I held it together. "hey, why don't you try the big blue thing right next to where you're digging around?" "Ok" Finally, she struck red gold. Ugh.

She did the same thing to another guy the next day (or it might have been the same day, brain is fried right now). He fainted... and just an entire mess ensued. Apparently he was able to eventually get the job offer after a bunch of hoop jumping.