Sorry Discovery Channel, glass is not a liquid at room temperature. The factoid about window glass 'flowing' is an oddly popular urban myth.

It's true that glass doesn't undergo a phase transformation from liquid to amorphous solid, but we can pick an arbitrary temperature and say that it's "solid enough" based on its properties. If you want to see glass flow you'll be waiting longer than the life of the universe.

Pitch, on the other hand, does flow very slowly. If you watch it for ten years you might see it move a hair.