This 1000-pound shell exploded at an altitude of 2600 feet. And the rest of the show isn't so bad either!
How is this sort of sculpture made? Via Colossal:
When first contemplating these glass sculptures by Seattle-based artist Carol Milne, your imagination runs wild trying to figure out how she does it. Glass has a melting point of around 1,500°F (815°C), so how could it possibly manipulated into neatly organized yarn-like strands that are looped around knitting needles. The answer lies in a technique invented by Milne in 2006 that involves aspects of knitting, lost-wax casting, mold-making, and kiln-casting.