In this event, four marbles, one from each team, roll down a course made of 15 pairs of halfpipe-shaped track elements. The first marble across the finish line advances to the next round, the slowest is eliminated and the middle two race against each other again to see who will also progress to the next round. The finale is a single race with the 4 advancing marbles, where the first to finish wins. Marbles eliminated from the event are ranked by how many rounds they entered, then by fastest time.
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