
Any transposition effect would work. Simplest example. One vanishes a cane, on the other side of the area the other produces it.
Almost Any effect which requires a spectator from the audience would be used.As Spike/sword thru neck. Head/hand/leg Chopper etc.
Comedy Competition; One does the trick right, the other does it wrong. T & R Tissue. Torn Tissue to hat, or panties.The Mismade Flag.; one messes it up. The other puts it right. The Sucker Beaker Vanish or any version Of Jack Hughes The Lady (Jumbo Queen) Vanishes Both show the audience behind the scenes thyen when done the right way round the audience is fooled. Sam Dalal I believe has recently put both out & The Vanishing Elephant( Jumbo card of a Jumbo Elephant) Again one does it the wrong way round 'exposing'it The other does it right. The Bathing Beauty is another example. One show the girl in a frock on the picture, folds it. The other pulls the frock off and so on. There is now a new version of this out with a modern looking beauty, USA Robert B....?
Ask around your Magic Club for anyone who has videoa of Ther Zodiace Brothers( Paul Knieve & Leonard?) or earlier still The Niberco Brothers ( Dutch) Then there's Kohl & Co. (Magical Disasters.)
Allen Tipton
Began magic at 9 in 1942. Joined Staffs M.S at 13. Nottm.Guild of M. (8 times President. Prog Director 20years)IBM. Awarded Magician of Month 1980 By Intern. Pres. IBM for reproducing Dante's Sim Sala Bim. Writes Dear Magician column for Abra. Mag.