The toughest shots for me with 
any kind of game bird have 
always been the ones I missed....
Straightaways, crossers, incomers, dropping out of trees, quartering away or in doesn't matter.... heck, I even missed a big longbeard at 30 yards, full choke, with the bead right at the top of his neck.
Birds I've killed when 
all the odds were stacked against me, at the time seemed so easy when it happened but later when I thought about it I wonder how I ever pulled it off.... 
.