Another gem from Ray Carlyle.
Much to my surprise, the basic hull card move was not the only method Hull used in his Q&A, rather one of 4 methods he employed. The Burling Hull "Volta" Question and Answer Act PDF explains Hull's complete Q&A act, along with commentary by Ray Carlyle.
I very much enjoyed this e-book, which provides you with full details for how to do a complete 20 min Q&A routine with minimal props or preparation.
This item is not currently listed on www.carlyletouch.com so you may need to contact Ray through his site to purchase it. Ray also offers pre-made Hull tent cards for sale, which are of thick stock and scored for easy folding in half:
If you are obsessed with the Q&A routine like me, you may wish to pick this book up. It's quite good.