Resolved questions
-던가 등에 쓰이거나 grammar

I have a question.

보통 무섭다라는것은 귀신(Ghost)을 본다던가 등에 쓰이거나

I understand what this sentence means. It means "Usually 무섭다 is used when you see a ghost or smth (in this kind of situations)".
But still I have some question. Could you explain me the point of ' ...던가 등에 쓰이거나'? Ending 거나 I see for the first time.