Princess Serena did not want her slave to fail her. She had entered him into a slave competition that she wanted him to win. She had prepared him well but to make sure he would win, she showed him the consequences of failure. She used her smelly sneakers as well as her stinky socks to humiliate him. He nearly choked and she told him that was just a tip of the iceberg. If he did not win, he would face worse.