Gandalf:
If you ever get a chance to fish the "Run" at Boiling Springs, PA that feeds into the Yellow Breeches, a bread fly can be deadly.
Maybe that's where Vocelli was fishin'.
In any case the locals feed the trout bread and any white marabou fly will work during the feeding frenzy. I actually saw some guy chumming with bread while fishing and he got caught by the Warden, it was hysterical! Unscrupulous me caught more than a few fish on white streamers while this idiot was breaking the law.
In my search for the patterns that imitate the weird things trout will eat, I have fashioned two versions of a French Fry Fly, one with ketchup the other without, it worked great on trout that lived in a stream behind a McDonald's, really! I also have a Cigarette Butt Fly but I only have a regular version, no menthol. Both are fashioned of clipped deer hair.
I also at one time had a Penny Fly for fish that swam around in wishing wells or ponds and a Loogie Fly, a blend of green and white marabou for streams where Longshoremen fish.
I never got around to making a Chewing Gum Fly or Gum Wrapper Fly but I have been working on a Sunflower Seed Fly made of clipped and spun deer hair for these gills that attack the sunflower seeds I often time munch on while fishing.
By the way, the Cigarette Butt and French Fry flies are DEADLY on ducks if Mallard fishing ever becomes legal in PA.