Most pig iron bars broken with the head in one minute - Guinness World Records Classics
This is dated, but Guinness just posted the vid. I love that he's in a Shaolin style robe.

Published on Feb 7, 2013

The most pig iron bars broken with the head in one minute is 99 and was achieved by Zhang Yulong (China) on the set of Zheng Da Zong Yi - Guinness World Records Special in Beijing, China, on 21 December 2010.