Quote from : The Hobbit: The Desolation of Smaug Movie

Thorin Oakenshield: [on his father, Thrain] You're like the others. You think he's dead.
Gandalf: I was not at the Battle of Moria...
Thorin Oakenshield: No. I was.
[flashback to the Battle of Moria; Thorin sees Azog decapitate King Thror and throw his head to the ground]
Thorin Oakenshield: NO!
[Thrain charges forward]
Thorin Oakenshield: Father...!
Thrain: Stay back!
Thorin Oakenshield: No, I will fight with you!
Thrain: Azog means to kill us all! One by one, he will destroy the line of Durin! But by my life, he shall not take my son! You will stay here!
Thorin Oakenshield: [voice-over] My father led a charge towards the Dimrill Gate. He never returned.
[Thrain charges into the orks' ranks with his bodyguard, and Thorin loses sight of him]
Thorin Oakenshield: [screams] Father!