Although he talks of throwing boulders, he never actually does so in the game.
Golem: Oh, yes, I met someone who was little lost...they told me they were going off to look around the beach.
Golem: Did you get hit by a boulder on your way up? Sometimes I throw boulders when I’m angry. I’m sorry if I hit you.
Golem: My mother always said that if I kept doing it, I’d run out of mountain to throw. Back before she was fracked.
Second dialog (triggered by speaking to the NPC, then completing a dungeon, then speaking to the NPC again, or triggered by completing all dungeons before speaking to the NPC the first time):
Golem: When you’re a rock, you see many generations of people come and go. You become ancient and wiser than the wisest among men.
Golem: At least, that’s the idea. I broke my binoculars a while back so I haven’t been able to tell what’s going on.
Golem: Actually, I don’t miss watching people much, it’s a bore.