Two guys went fishing along a river, an old man and a young man. The old man sees a snapping turtle floating down the river towards him; with a shout of rage, he leaps into the water, drags the turtle out onto the bank, pummels it, then grabs it by the tail, spins around and around, finally flinging it back into the water with shouted curses. "What did you do that for?" the young man demanded.
The old man held up his left hand, which was missing the pinkie finger. "I was fishing in this same spot forty years ago. A snapping turtle bit my finger off. That's the same turtle, and when I saw him, I just couldn't help myself."
"How could you possibly tell it was the same turtle?" the young man asked.
"Oh," the old man replied, "That's easy. I have turtle recall."
I'll show myself out.