The boss says that for their first day on the job, the Russian is in charge of concrete, the Mexican is in charge of wood, and the Korean is in charge of supplies.
The boss then leaves and comes back a few hours later to check up on his new workers.
He walks over the Russian, and all the concrete mix is stacked up nice and orderly. The boss tells him “great work!” and moves on.
He walks up to the Mexican and sees that al the wood is stacked in a perfect pile, so he says “wonderful job!” and moves on.
He then looks around and sees that the Korean is missing, and supplies are everywhere. Out of nowhere, the Korean jumps out from behind a pile of dirt and yells “SUPPLIES!”