I stumbled across a new idea and method for an effect by accident the other day. Here is the effect: The magician displays a bottle of water, and has two spectators help him. He tells them that the water is in fact ice cold, just drawn from the fridge. He asks a spectator to hold out their hand and a tiny bit of water is poured on it. They confirm the temperature is indeed cold. However, you immediately pour the same water on the other spectator's hand and they visibly react to the fact that the water has suddenly become very hot! No switches or anything of the like. You can even do this on a single spectator and with a single continuous pour! They actually feel the water go fromq freezing cold to boiling hot in a split second! I am still working on it, just want to know what you all think of the idea. Has it been done before at all? Would this be workable? Thank you!