He popularized the "lightning bolt" pose, also known as "to di world" or "bolting", which he used both before races and in celebration. The pose consists of extending a slightly raised left arm to the side and the right arm folded across the chest, with both hands have the thumb and index finger outstretched. His performance of the pose during his Olympic and World Championship victories led to widespread copying of the move, from American President Barack Obama to small children. It has been suggested that the pose comes from Jamaican dancehall moves of the period, though Olympic sprint champion Bernard Williams also had performed similar celebration moves earlier that decade. His habit of fist bumping the volunteers for good luck has been noted in the media.