and another ...
An elephant is drinking out of a river when he spots a turtle asleep on a
log. The elephant ambles over and kicks the unsuspecting turtle clear across
the river. "Why did you do that?" asks a passing giraffe.
"Because I recognized it as the same turtle that took a nip out of my trunk
47 years ago."
"Wow, what a memory!" says the giraffe.
"Yes," says the elephant. "Turtle recall."