The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
to guarantee success with a nymph, i have to use tongue and teeth to get it thoroughly wet before I cast it.
I'm sure I'm not the only one who has noticed how often the trout take at the moment when we are most distracted and not paying attention.