Only weeks later after a similar incident, another rider was hit by a mystery object on the coaster. This time they reported being hit in the foot, arm and face which drew blood. Following the two incidents, Dragon Challenge will never duel again. Source

A man riding on the front row of one of the two dueling Dragon Challenge coasters was hit in the eye by a mystery object, presumed to be a loose article dropped by a rider on the other roller coaster.  Source