I can't belive how many of us have had accidents. I once cut the side of my thumb that was holding the ruler. Unfortunatley I had just taken a pill for a migraine which you would think is the reason that it happened but not really. The problem ended up that it would not stop bleeding from the migraine pill.
It figures I did mine while cutting. I am always very sure to put the blade back when I put it down. I have read too many stories about people picking them up with the blade out.
Feel better soon :(