TV
They say the snow on the roof is too heavy. They say the ceiling will cave in. His brains are in terrible danger.
— River · Firefly

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker teases someone about hair so voluminous it seems structurally dangerous, joking that its sheer weight might crush the skull beneath it. It's a whimsical, slightly nonsensical way of poking fun at an exaggerated hairstyle, treating it like an architectural hazard rather than actual danger.
Context reviewed