I took some diaphrams to the State Fair years ago and found my way to the livestock area. Without giving myself away, I went to where the turkeys were and started yelping. To a bird, their heads went up and they started a gobbling hard between themselves. Anytime they'd get quiet, I'd purr or yelp a few times and fire 'em all back up again. Nobody but my wife knew it was me getting them going and people started coming from other parts of the building to see why the gobblers were making noise all of a sudden.
Now barnyard turkeys probably aren't the most difficult in the world to fool, but it did give my ego a boost by how well they liked the sound of my calling.
Luck Counts, good or bad