whats with jet li and the left hand in his pocket

[dalt01]

watched "cradle to the grave" last nite and the whole time jet li kept his left hand in his pocket even when opening a passenger door on a car he would reach across to open it and even sometimes during a fight. im not familiar with him at all and i thought maybe his left arm was crippled or something and when he did use it in a fight scene it was CGI affects. i know that sounds silly but it sure looked that way. any jet li fans that can set me straight on this, has he always done this weird thing with the hand in the pocket or am i the only idiot that ever even noticed it?