I agree--it can be hard. DS seems to be upset by evocatively written sad scenes. If it refers to death but is not written to evoke sadness, it's okay. But it doesn't even have to be death to be bothersome--it can just be sort of sentimentally gloomy and sorrowful. I would say it wasn't such a big deal except that he has a tendency to dwell on/obsess over sad topics at bedtime anyway (we call it his existential bedtime depression).