Angered by Prometheus’ trick, Zeus tried punishing humankind by hiding from them the gift of fire. Prometheus didn’t think this just, so he stole the fire from Olympus and brought it back to earth in a fennel stack.
In honor of this act, the Athenians instituted a race, during which runners of the same team passed between them a flaming torch until the last runner of the winning team had the privilege to use it to kindle the sacrificial fire on the altar of Athena on the Acropolis. This, of course, marked the origin of both relay races and the modern Olympic flame ceremony.
Zeus was outraged by Prometheus' theft of fire and so punished the Titan by having him taken far to the east, perhaps the Caucasus. Here Prometheus was chained to a rock (or pillar) and Zeus sent an eagle to eat the Titan's liver.