I was shooting clays with two friends, with a old ML 12 ga double, cut down to about 20". I always took a little good natured flack for using it, as my friends both had autoloaders. I am cross dominant right hand/left eye, always shot long guns off left shoulder. Anyway, I was resting the shotgun on my left shoulder, right hand on the grip, when I noticed a rabbit break cover about twenty yards to my right, crossing in front of me. He headed into cover again, and before I could think, I:
Calculated that he would cross a yard of open space, 20 yds in front of me slightly to the left;
Mentally noted my two amigos were behind me opening a box of clays;
Remembered rabbit season opened the previous week;
Brought the double up and around on my RIGHT shoulder, (never tried that before);
Dropped on the open space, figured rabbit speed and fired.
Found the rabbit a couple of yards into the brush on the left, majority of the shot mass in the head. Could never do that again if I tried for the rest of my life, and never heard another word about my shotgun.