Nick was admitted to a mental institution because he heard voices talking to him that no one else could hear, and he saw demons attacking him, though no one else could see anything near him. nick's symptoms are known as

Nick’s symptoms are known as hallucinations. This allows him to act out like how he is experiencing in the present for hallucinations makes a person have a strong feeling about things that is clouded or in store in his mind that make him believe into seeing these things that aren't even present but he thinks they are because of the powerful feeling that he acquires that corrupts his mind that interferes his mood, his way of seeing things, hearing or how he responds.

be confident on yourself. ignore such fools and move on ; )