Jackie Chan broke twelve concrete blocks with just his arm, while keeping the egg he was holding intact!

Jackie Chan is well known for his martial arts prowess and shows off his skills in films like Rush Hour and Shanghai Knights. He was apprenticed to the China Drama Academy at just 6 years old and studied dance, acting and traditional martial arts. While there, he was offered a small part by a visiting filmmaker and thus broke into the world of film.

Chan performs all is own stunts, often injuring himself in the process (for proof, watch the outtakes of the Rush Hour films). He is undeniably gifted and able to perform feats that regular humans cannot. For example while on a talk show, Chan broke 12 concrete blocks with just his bare arm. All the while, he kept the egg he was holding intact.

The blocks were divided into groups of 4 and stacked on top of one another. Chan broke all 12 blocks in half and kept a light enough grip on the egg not to break it. Now that's controlled strength.

(Source)