Mounted Games is hard to explain... lol.
Its games on horses, as the name suggests.
Each game consists of different skills, putting balls on cones, flags in cones, bending, vaulting on and off at speed, all done very fast.
Its normally played as a team of five, in a klind of relay form, with four riders participating in each arce, allowing you to choose the four strongest in each race. Its really fast paced, and once you get into the higher level really very complex, the tiniest incorrect aid or split second timing can change the outcome of a race.
Its excellent for spectators, and I love it, good for the adrenalin junkies out there :]
Australia is actually hosting the world team championships this year, going to be amazing!