I'm very interested to see if the idea of holding a pin in the other hand would distract the focus of your attention, anyone have experience with this?
When going through secondary school I wanted to be a doctor, I used to be fascinated by all things medical and gore wasn't a problem. I used to donate blood and chat with the nurse as she put the needle in and I would watch, when I had an operation on my ankle I asked to a local to be able to observe the procedure. Over years I've become more and more squeamish (through no apparent trauma or event, strangely) to the point where I feel very nervous sat waiting for an injection and would think twice about giving blood again. Quite glad I'm on the way to commercial avaition now, [hopefully!] no blood and guts involved.
I like Loose Rivets' idea, I might focus on that when I have the final part of my root canal filling done on Tuesday