Viper and Squirrel were friends and even shared a nest, but then Viper ate Squirrel's children.
"If you eat my children again," Squirrel said, "I'll kill you."
Viper just smiled and nodded, confident Squirrel could not harm him.
Time passed, and Squirrel had more children. Then one day she returned to her nest and the children were gone.
"Where are my children?" Squirrel cried.
Viper slithered down to the ground and said, "I don't know."
Squirrel squeaked and chattered until a hunter came and, seeing Viper at the foot of the tree, the hunter killed him.
That was Squirrel's revenge.
Inspired by: "Akpwe Viper Pays for His Deception" in Bulu Folk-Tales (in Journal of American Folklore) by George Schwab, 1914. The Bulu are a people who live in Cameroon.