Glassmakers have learned to move continuously. If they stop, with molten glass taking shape at the end of a rod, the glass will obey gravity. Twirling the piece is the first essential, and how it takes shape depends on many factors... keeping correct heat, blowing, adding additional molten glass, shaping with a variety of tools, and always the twirling. Concentration and coordination! This demonstration occurs many times every day at the Corning Museum of Glass in Corning NY.
Ed works in Corning several days a month, and I get to explore, learn and photograph.