Instructions
Escape by Using Ketchup
Call Otacon on your Codec device, then wait for him to arrive. He gives Snake two items: a bottle of ketchup and a scarf.
Wait for the guard to go to the restroom. When he does, equip the ketchup. Snake splashes it around on the ground and lies down in it, playing dead.
Knock the guard out when he returns and opens the door to see what happened to Snake. Exit the cell.
Escape by Hiding Under the Bed
Wait for the guard to leave the room.
Climb underneath the bed and wait for the guard to return and open the door.
Come out from underneath the bed and knock out the guard, then exit the cell.