Sam Angelo shows how the Amazing Doughnut Chuck is designed to hold a vessel. He chucks up a bowl and hollow form and finishes the bottom of each. Sam demonstrates how the Amazing Doughnut Chuck is put Sam Angelo shows how the Amazing Doughnut Chuck is designed to hold a vessel. He chucks up a bowl and hollow form and finishes the bottom of each. Sam demonstrates how the Amazing Doughnut Chuck is put together and how it is taken apart.