An American, a Belgian, and an Ivorian meet a genie by the sea shore. He tells them:

“Throw anything in the water. If I find it, you will die. If I don’t find it, I die, and the person who win will become as rich as Croesus.”

The American throws a tiny metallic marble into the water. The genie finds it, and he dies.

The Belgian throws a small transparent nylon thread. The genie finds it, and the Belgian dies.

The Ivorian throws something into the water. The genie looks, and looks, and looks; but does not find the object. Tired, he asks: “Djo, what have you thrown in the water?”

The guy replies: “A piece of Efferalgan (effervescent pill), buddy!”

The original in French is found on Nouchi.com. Translated to English by Dr. Y., Afrolegends.com