For the splitting the hair, shaving the arm's hair, slicing phone books knife folks or anyone who just likes a fun video, here is a slow-motion of a Kramer knife being used to slice through 3 water bottles in a row. Shot with a Phantom camera which can shoot up to 2570 frames per second (for us camera geeks).
The knife he's wielding in the video is not one of the hand-forged beauties, but a mass-produced Kramer. by.Zwilling J.A. Henckels.