Glass Blower At Work

This picture taken at the Observation Deck at the Blenko Glass Factory in Milton, West Virginia.
The picture shows the Glass Blower placing the Glass in a mold where he taps it once or twice on the bottom of the mold and then blows air in the blowing pipe to make it form its final shape.
Just a note that after adding air to the blowing pipe he places his finger over the end to maintain the air pressure inside the glass until its ready to be removed from the mold.