-Keep going through Ocelot's torture after Otacon gives you food. Do not hide under the bed but wait until the guard is done vomiting. He will vomit five or six times. The ninja will now help break you out.
-While getting tortured by Ocelot and you do not submit, Johnny (the guard) will take you to the cell Although you get many chances to get out, do not. When Johnny brings yoy in for more torture, try to survive until he puts you back in the cell. Continue this process without escaping, and the ninja might be the one that breaks you out.