MGS2 - Watching Guards Magically Spawn In 

When guards are incapable of calling in an alert or caution, they'll exit the room and call in the caution over there. They also cure their injuries, fix their radios, and possibly call in reinforcements. However, in rooms without clear exits, they'll try to go far away from the player instead before calling in the caution. We can work around this and have a look at what the player isn't supposed to see.