protected function _updateTimers()
    {
        if(!isset($this->timer))
        {
            $start = time();

            $timer = array(
                'start' => $start,
                'last'  => $start,
                'now'   => $start
            );
        }
        else $timer = $this->timer;

        $timer['last'] = $timer['now'];
        $timer['now']  = time();

        $this->timer = $timer;
    }