Well, yesterday I thought i would make a mold out of Plaster Of Paris for some jig heads. After it was all done drying i took out my trusty pocket knife and began to split the mold. As i'm pushing down on the mold with my knife i am also trying to hold it, And as i'm pushing the mold just decides it wants to pop open making the knife fly down right into my thumb. The only thing that really stopped the blade was my nail, But i dint cut straight in it was also on a angle So the cut is around a half inch long and just shy of a fourth inch deep. I guess if I got any tools with blades for X-mas they are going back to the store, before i find out about them.