Poseidon who had never forgiven the Athenians for accepting his gift of the horse, but choosing to name their city for his neice Athena because she created the olive tree for them. Now they were putting olive branch wreaths on the winning athletes heads, and the games were being held in Athens. It was supposed to be laurel wreaths, and in Olympia NOT Athens!
Seeing his opportunity, Poseidon chimes in, "A splendid idea, Hermes, those male runners really will be stallions--at least from the waist down!" He raised his trident and thunder crashed.
Waiting at the starting blocks, the runners tensed as the gun was fired. It sounded like a thunder clap. Their crotches and thighs suddenly were trapped in too tight fabric, which began to rip as they were stretched to the limit. The racers ran around the dirt track, as they began to change into centaurs. Their singlets ripped to allow their extending torsos to sprout a second set of legs. By the time they completed their first lap, they were all magnificent stallions from the waist down. They completed the second lap in record time as the announcer struggled to describe what was happening on the track as he watched in disbelief.
"This is not a theatrical representation. Those runners just changed into centaurs!"