hahaa...i had a similar experience when i was working at IBM. I decided to go donate blood so I went after lunch. As I was walking out to the bus they asked if I wanted to donate platelletes...she started telling me about how it is using young children who needed it, so i couldnt say no. she directed me back to the building since thats where those machines were setup. they looked at my viens and told me it wouldnt work and sent me outside.
i go to the van and they ask if i want to donate plateletes again...i told them what the people said but the lady said it was fine and she could do it in the bus. They try a few times to tap my vein and finally get it. For those unfamiliar, they take out the blood, remove the plateltes, and pump the blood back. Apparently when the machine were pumping it back, the needle shifted, and the blood starting pooling under the skin. it bubbled up about 1/2" while i was frantically calling for the nurse. She tried to cover up the wound and remove the needle, but she did a poor job. The blood literally squirted EVERYWHERE, shooting all over the nurses shoes, my shirt, the seat, and the bus window.