Kribby, you are probably right, I've only had trouble with one. So funny!
I got such a huge bruise from her one time (hubby was there and i saw him cringing) needed another BT the next day ( yes, her again) She wanted to attack the other arm and I said no, may as well keep the bruising localised. I even showed her what vein to use (nurses make the worst patients) and she was so off the mark by about 2cm!!!!!!! Yep, another massive bruise. She did do it with a smile though, I like her. lol.