Photo: DogFromSPACE [Flickr]
For Halloween, Sterling Ely built himself and friends a set of Ghostbuster proton packs out of foam. Silly strings substitute for real proton discharge, and I'm sure that Sterling remembered not to cross the stream to avoid total protonic reversal.
Link: Ghostbuster Proton Packs [Flickr photoset] | The proton packs in action