The "double sawing illusion" is a way of adding an extra effect to box-type sawings. It is generally associated with the "thin-model" sawing apparatus. The magician saws two people in half using two sets of apparatus. The people are usually chosen or dressed so as to be clearly distinguishable. For example, they might be in different colored costumes, of different skin colors, or of different genders. After the box halves are separated they are jumbled up and then re-assembled so that the bottom half of one box is matched to the top of the other and vice versa. When the victims emerge, each appears to have been given the other's lower half.
The creation of this version has been credited to magician Alan Wakeling, who devised it for fellow magician Channing Pollock to perform.