Pacemaker runs out, you’re old!
Peace Be Upon You!
You know you are old when your pacemaker quits on you and they no longer made the batteries to keep it operating. You know you are old when you can no longer eat more than six plates of food. Or drink two gallons (litres) of Coca Cola. You know you are an old man when your beard hair falls out and you no longer need to shave your face. You know you are old when you spend your time here for hours on end. 
Sarge Booker (61 year old man)