Passage is a movement seen in upper-level dressage, in which the horse performs a highly-elevated and extremely powerful trot. The horse is very collected and moves with great impulsion.

The passage differs from the working, medium, collected, and extended trot in that the horse raises a diagonal pair high off the ground and suspends the leg for a longer period than seen in the other trot types. The hindquarters are very engaged, and the knees and hocks are flexed more than the other trot types. The horse appears to trot in slow motion, making it look as if it is dancing. The passage is first introduced in the dressage intermediaire test II. A horse must be well-confirmed in its training to perform the passage, and must be proficient in collecting while remaining energetic, calm, and supple. The horse must also have built up the correct muscles to do the strenuous movement.
Retrieved from "http://www.equestrianlife.com/wiki/Passage"

Piaffe is a dressage movement where the horse is in a highly collected and cadenced trot, in place or nearly in place. The center of gravity of the horse should be more towards the hind end, with the hindquarters slightly lowered and great bending of the joints in the hind legs. The front end of the horse is highly mobile, free, and light, with great flexion in the joints of the front legs, and the horse remains light in the hand. The horse should retain a clear and even rhythm, show great impulsion, and ideally should have a moment of suspension between the foot falls. As in all dressage, the horse should perform in a calm manner and remain on the bit with a round back.

The piaffe was originally used in battle to keep the horse focussed, warm, and moving, ready to move forward into battle. In modern times the piaffe is mostly taught as an upper level movement in Classical dressage and as a Grand Prix level movement. Additionally, it is needed to develop the levade and from that the airs above the ground.

The capriole is a movement where the horse leaps into the air and pulls his forelegs in towards his chest at the height of elevation, while kicking out with his hindlegs.

I was going to answer, but see you have done so perfectly well... Ruth

i think its called the piaffe and its in dressage :)

PIROUETTE

i think it is the piaffe too that you are thinking about..!

a piaffe and a capriole =]... i really like dressage!

Piaffe would be when the horse is collected and canters in one place. The capriole is where the horse leaps into the air with front legs tucked up and kicks out with the hind legs.

'Piaffe' is the term used when the horse is lightly jogging in place (not moving forward or backward).

Piaffe