A knife...? No, no... You amateur. I have a glove. Special made, you see. The fingertips are covered by thin razors melded into strips of barbed, rusty metal. I've taken an ice pick and given the edges multiple serrated points. Rips into the pelvis very smoothly, but never comes out as clean... Knives don't give me enough contact. It's just not done proper unless I can feel the organs twist around my fingertips.
I love fingershanking~