When I used to work in Pathology as a trainee, I was being supervised by some girl who was barely older than me.
Anyway, she was nattering at the back with the hot Avril Lavigne lookalike trainee and I was practicing my skills on a mictrotome - a machine that slices microns of tissue embedded in paraffin wax.
Being a trainee, I of course, sliced my finger open, turned round to the supervisor and said "Erm, I've cut myself" as blood seeped from my wound.
She went white and I then spent the next few hours in A&E after having read through the patient report to make sure they didn't have anything icky that could infect me.
Harrowing.
However, this traumatic event was eleviated by the fact that the damage was on my middle finger, which looked rather smart all bandaged up. I could flip people the finger without them ever knowing...