6 Jackie Chan broke twelve concrete blocks with his hand while keeping the egg he was holding intact.

When Jackie Chan was invited to a talk show, he not only charmed the audience with the interview but also impressed the audience with his Kungfu skills. He broke 12 concrete blocks with his bare arm! The blocks were divided into groups of four and were stacked one top of the other. Jackie cupped an egg in his palm and using that same hand broke all the blocks in one go! The egg remained unbroken throughout this stunning display of his prowess and controlled strength.(source)

7 At the age of seventeen, he worked as a stuntman in the Bruce Lee films Fist of Fury and Enter the Dragon.

Jackie Chan worked as a stuntman under the stage name Chan Yuen Lung the Bruce Lee movies. While shooting a stunt sequence, Bruce Lee inadvertently hit the energetic 17-year-old Jackie on the side of his head causing dizzy spells and intense pain to Jackie. Jackie Chan considers this the best ever moment of his life because Bruce Lee was overcome with remorse and was concerned about Jackie.(source)

8 He is a perfectionist, Jackie Chan once shot over 2900 retakes for one scene.

The 1982 movie, Dragon Lord had a sequence where Jackie was supposed to kick a feathered shuttlecock in one continuous moment. Jackie decided to shoot this acrobatic action sequence in one continuous shot and it took 2900 takes and over forty days to get that perfect shot! (source)

9 Jackie Chan, working as a nightclub bouncer, once spent two days after a fight trying to push his bone back into his fist. He later found that it wasn’t his bone… It was the other guy’s tooth.

Jackie Chan gave up his dreams of becoming a nightclub bouncer after he realized that his martial arts skill could actually hurt people. Jackie knocked out a man in a fight, he made a horrifying discovery that a part of his bone was protruding out, he did not go to the hospital fearing police, instead he tried pushing the bone inside. Two days later he realized that the whitish bone lodged in his knuckle was the tooth of the man he knocked out.(source)

10 Jackie Chan used to carry multiple guns and even a grenade to protect himself and other artists from the Triad in the 80s and 90s.

In the 80s and 90s, the Triad (crime organization) had infiltrated the Honk Kong film industry. The Triad used the film industry for money laundering . The cinema industry also had to pay protection money to ensure their survival. Jackie Chan refused to bow to the extortionists thus angering the triad. They started to dog his every step, forcing Jackie and his other artists to carry guns and grenades for their own safety. (source)