Taken with a Cannon EX-F1 at 300fps. Five tiles, 6" x 6" x 1/2", 375 LBS each to break (pencils in between). Stack was duct taped for ease of set up. Camera was operated by Ed Mitchel of Indelible Images, Inc. No animals were harmed in the making of this video. The pencils, sadly, did not survive. Approximate hand speed at impact 70mph.