1-Theme of Anger
We can see how when Hamlet runs and jumped in the grave beside Laertes, Laertes seized his throat because he was angry, and very bitter towards Hamlet.
2-Theme of Unhappiness
We can see how when Laertes was leaping into the open grave, he was not happy.
3-Theme of Love
We can see how Hamlet loves Ophelia when he says forty thousand brothers could not love her than him.
4-Theme of Hatred
Laertes is having hatred for Hamlet that he could even cut his throat in church.