After the escape from the shed where Buck saves Yong, the masked assailants open the door, where a dead person lies in the shot. When the door opens, the dead person twitches and blinks.
When Buck's SUV pushes the Hyundai Sonata backwards into the pond, a cast member is visible briefly on the right side of the screen attempting to jump out of the way.
When Jackie is attacked in the Turkish bath house and he runs up to the roof and around the domes, the shadow of the camera is visible in the lower right corner of the picture.
When Jackie is on the arm of the crane during the bank robbery sequence at the start of the movie, his safety line can be clearly seen as he moves around.