I hand wrap my rods after final planing, to look for problems.  Of course I tie off each end.  I was unwrapping one last night and got to the end.  I decided to push the knot off rather than cut it off.  Bad move. 

I know I've got a nice 60d corner. Sharp enough to slice open my thumb!!! Oh well. (Terry Kirkpatrick)

I have a small irritating splinter buried deep in my index finger from doing exactly the same thing. it has been there more than a year now despite frequent attempts to 'dig' it out. (Steve Dugmore)