Briefly summarize Hamlet's murderous visit to the Queen's Chamber.

Hamlet and his mother have it out with Polonius hiding behind the curtains....again. I wonder if anybody saw his shoes? Hamlet chastises his mother with some creepy incestuous undertones. He gets pretty aggressive and mother yells. Polonius yells from behind the curtains. Thinking it's the King, Hamlet stabs the "unseen good old man."