Cinemilitia

My question is quite off beat. I am a film maker, and I am trying to get a shot of flowers withering within 60 seconds. I have asked dozens of Bio/Chem professors about how I could accomplish this. Most of them agree that any chemicals strong enough to destroy the molecular composition quickly enough to see visible withering or drooping would be potentially very harmful to my cast and crew. I am curious, does anyone know how I could electrocute a bouquet of flowers in a vase in a controlled manner in order to produce the effect that the flowers have died? Any help or references are kindly appreciated. Thanks in advance!