Ajax goalkeeper Maarten Stekelenburg usually has a safe pair of hands, but he managed to drop the Dutch league's trophy from the top of a bus as the team took a triumphal ride through Amsterdam.
Amateur video shows the trophy fall backward off the bus, apparently after colliding with overhead tram wires on Sunday. It was handed back by a fan, to the applause of onlookers.
The incident resembles one from last month when Real Madrid's Sergio Ramos dropped Spain's Copa del Rey trophy.
Ajax sealed its 30th league championship with a 3-1 win over Twente.