The horse had broken loose from its reins, according to local news reports, and did not stop until it crashed its carriage into a standing taxicab. No one was injured -- including den Dekker, who had plenty of time to move out of the way.
"There were people everywhere," den Dekker said. "It was the excitement of the off-day for me."
Anthony DiComo is a reporter for MLB.com. Follow him on Twitter @AnthonyDicomo. This story was not subject to the approval of Major League Baseball or its clubs.