I was twelve years old at the time and my best friend and I were hunting a field in Southeast Missouri.  By that time, we were both seasoned veterans having 4 solid years of artifact hunting under our belts (ha ha).  While scanning the ground for remnants of what ancient man had left behind for me to find, I was also throwing my buck knife ahead of us trying to make it stick in the ground.  That sounds totally ridiculous I know, but it was entertaining at the time. It also proves that I could multitask at an early age and the knife safety in cub scouts had obviously paid off.   Long story short when I went to pick up my knife it had landed on what I thought was a very nice arrowhead.  I don't know if you can see it in the picture but the base has a hair line crack.  We thought it was neat that the knife had landed on top of the point until I picked it up and the base was no longer intact. At the time I didn't know what a Hardin was.  I did know that it was a nice thin well-made arrowhead that I managed to break before I even saw it. To this day that is the only piece that I have personally damaged. Lesson learned the hard way!