the formula for invisibility

tonight, walking along bloor near church, a homeless man rattling his coin cup energetically trying to sell his wares, was inviting passersby to "come sit down and find out about the formula for invisibility". I think i even detected the hint of a jingle.

Interesting product -- having just come from hearing Ross Smith, a veritable 'Branding Guru' speak about reaching your customers by tapping into their emotions,...i think, with a little bit of fine tuning, this man would have himself one heck of a lucrative business.