Hidden trap as is in non existing

Hidden trap is something that we cannot see, even we predict that there is one some where. We won't know how the trap are design, we will never when and what will trigger the trap. When we know there is a trap we will just keep in mind to be careful. When we are not we fall into one. Sometime even we are alert we will not notice it. Sometime we even don't know that it is a trap until we fall into one. How is this related to existence? Existence of someone are some how being ignore sometime. Even they are rite beside you, but there is no intention to communicate or anything. When they see you alone they just left you there. They know you are there and yet a lot of things they do they will not think of you unless reminded by someone. This shows how small that person existence is. As in hidden trap we know it is there even know what is it but we just keep in mind not to trigger but not to release or give warning to the others who is coming and just leave it as what it is. If the people in your group does not says let stop moving and entrap the place then no one will care. Hence sometime existence of someone is notice just because of someone else existed beside them, when they are not around this is where they once again become un-notice and un-exist.