The young woman wears her emotions outward, while the Witch swallows hers down like the most horrible tonic. The Witch helps where she is able, all while trying to learn the young woman's part. But every time they're swallowed down, glass littering the floor.
The snow comes down and down with no end in sight. Cars have trouble starting and staying on path, but here we see something we don't normally. People in other cars leaving the safety and warmth to help those who cannot get free. Warmth of others isn't necessarily out of reach.