Baffling Bra You have a lady step forward to assist you.
Displaying two scarves, you tie them together and then have the ladh hold them against her chest. You take hold of the two corners of the scarves and state you will cause them to penetrate the lady's body. You count "1,2,3!" At the count of three you pull, but instead of a penetration, you now have a brassiere tied between the two scarves. Good comedy magic at the right time and place. Proven success. Complete and ready to go.
