Hamlet starts to show us his crazy side in ACT I in a plot against Claudius who we find out killed his father while sleeping in the garden. Hamlet is taking time to mourn the death of his father and feels as though his soul and everything else hurts and is mad at his mother for celebrating this day for she is marrying Claudius. With her husband dead how can she not mourn but celebrate and forget the passing of her late King. Hamlet still in a state of depression dressed in his black attire walks in to the "party" in a dissaproving manner of his mom. It boggled my mind how one in love can seem to forget and move on so quickly without even thinking or honoring the late king. She even looks at her son like he is crazy because he is hurt by what has just happened to his father while his mother has already moved on and especially moved on with the man who had killed his father. Hamlet is on a mission to get back Claudius and even though we already believe that Hamlet is going crazy shakespeare uses the Ghost to distract us from Hamlets problems and explain that Claudius is the real killer and that Hamlet needs to fight back.