The tourney lasted ten days, and the realm’s finest warriors participated in jousts, axe-throwing and archery contests, horse races, and more. One jousting match occurred between a mysterious knight in mismatched armor, who won against three other knights in a tremendous victory. This mystery knight was dubbed "The Knight of the Laughing Tree," named for the laughing weirwood tree emblazoned on their armor.
The identity of the Knight of the Laughing Tree was hotly contested -- yes, even Westeros has Game of Thrones theorists. King Aerys was convinced it was an enemy put forth to mock him, and he ordered his son to find the knight and unmask him. Rhaegar was only able to find the knight’s shield, which was abandoned by a tree.
Rhaegar eventually won the final joust and was named champion of the tourney. In a surprising turn of events, he rode straight past his wife Elia and placed a crown of blue winter roses on the lap of a young Lyanna Stark -- who was betrothed to Robert Baratheon at the time -- which made her the "queen of love and beauty," a traditional title given to the loved one of a tourney winner to whom he dedicates his victory. This shocked the crowd, angering Aerys, the Starks, and Robert.