This effect will send chills up the spine of any spectator! The magician has the spectator choose a card. Then once the card has been selected, the magician pulls out a piece of glass. He asks the spectator to blow on this glass. Once the spectator does so, a ghostly image of their chosen card appears!
This effect will work on T.V.'s , car windows, and anything else that has a shiny, non-porous surface, so get creative!