What disturbs Ophelia in Act II, Scene I in Hamlet?


What exactly happens in Act II scene 1 of Hamlet that disturbs Ophelia?


Hamlet entered in Ophelia’s room in crazy mood, without having hat on his head and with untidy shirt, unusual outlook for an emperor to be. Then, she runs towards Polonius as Hamlet appeared in a distracted state, scared her while she was sewing.

After learning from his daughter that her rejection “hath [has] made him [Hamlet] mad,” Polonius finishes the following scene by telling her to come along and inform King about the reason of Hamlet’s acting strangely and madly.