Ed Moulthrop was a wood turner from Atlanta who died several years ago. Ed was probably the pioneer of this type of large turning, although I don't know if he did hollow forms. He did do very large bowls. Some of his turning tools were six and eight feet long. Have a catch with something like that, and it might fling you across the shop!!
I've got to admire the courage of these guys in addition to their talent, creativity, and resourcefulness.
Matt