run out of steam
become tired become very active blow whistle burn candle at both ends eat eat healthily and sleep eat well and rest exercise for hour exercise to physical limits exersize exhaust yourself someway forget to eat get get more energy go to limit let fire go out let water boil off not consume more calories open valves over work pause push yourself too hard run alot run with maximum energy stop adding water stop putting coal on fire stop refueling take breather use up all steam use up reserves use up steam have work hard work real hard work too hard work very hard