Eating food replenishes stamina. How much stamina Naked Snake has affects how quickly he recovers from injury. The greater it is, the faster he heals. Having low stamina (less than 50%) causes Snake's hands to shake while holding weapons. Snake's grip and oxygen (O2) meters are limited to his current stamina; both meters will run out faster if Snake's stamina is low when hanging or diving. Also, his stomach will start to rumble, alerting guards to his location. Both of these effects increase as his stamina gets lower. Some rare foods, such as the Tsuchinoko, are extremely rare, however, when eaten will cause the player to recover large amounts of Stamina, and in the Tsuchinoko's case, will make the player recover all of it. If the player captures animals alive, a grid can be seen on the an