Denmark portrayed as a diseased, corrupt place.

Hamlet's discussion with Claudius about Polonius' death and how the body of a king may be eaten by a worm underscores the moral decay at the heart of the play. Hamlet's antic disposition allows him to be honest about thsi moral decay.

Hamlet's mind seems corrupted, in actual fact it is Denmark that is corrupted. Hamlet uses his Antic Disposition as a Defence Mechanism

Meeting the skull of his Father's Jester Osric who he had known as a child. Literally comes face to face with a child.

Entire scene means Hamlet comes face to face with the reality of death.

Hamlet comes face to face with his murderers - Claudius and Laertes

Knowledge that Ophelia was buried in a graveyard because she is of noble birth, lowly folk could not expect same treatment.

Rumours around Ophelia's death - gravediggers version of events V Gertrude's version of events.

Claudius' ease at killing Old Hamlet? His lack of concern for Polonius. Ability to use Laertes as a pawn for his own benefit?

Hamlet - Takes him so long to commit any murder, when does so, it is the wrong person? THEN, he's on a roll?