1958 - October 30, 1990: Age 32
Joseph Burrus was a magician who wished to perform an illusion in which he was buried alive in a plastic box of his own construction. The box was to be lowered into a hole and then covered in dirt and concrete. During the performance, however, the cement crushed the box. When the crew realized this they pulled him out, but he had died.
Sources: Wikipedia, The Nightly Quill