Matt Barnes just can't seem to keep his cool.

Chasing Derek Fisher wasn't enough, so he decided to go after the Bucks' John Henson after Henson punched his shot out of bounds in the closing seconds of Milwaukee's win over the Grizzlies.

While Henson was teed up and ejected for taunting, Barnes couldn't take the stare-down abuse so he decided to chase Henson into the locker room. 

Another example of when keeping it real goes wrong.