On 2/2/2016, Darrell R. Smith did an amazing feature. Transferring chi energy through 66 inches of cinder blocks making the top one explode, and the third one from the bottom explode 33 inches of cinder blocks 48 inches down with internal chi power world record the only one in the world to perform this type of break ever. He did this at Waldorf, Maryland, USA.
Darrell says: The most cinder blocks broken by hand of all man kind and world martial arts history.
More information about Darrell:
This web site is one of Darrell’s grandmasters in iron palm and Chi Kung:
You can see the videos here: