This fella is on safari in Africa when he comes across an elephant lying on
the ground, in distress. He investigates and finds a thorn in its foot. He
removes it, and the elephant trots merrily away.
Twenty years on, the man is standing in the street in London watching a
circus procession pass by. When the elephant gets level with him, it stops,
looks straight at him, reaches out with its trunk, lifts him bodily into the
air, smashes him on the ground and jumps on him.
It was a different elephant.