MIE - of course she knows, she's Parelli trained ;)
Oh dear me, I have a very short tolerance to these questions tonight (looooooong day at work!), I should probably stop answering them!!
Mate, as others have said... passage isn't just a party trick. If it was, why the hell are us dressage riders spending so much time, effort, money, blood, sweat and tears on our sport to achieve movements such as the piaffe and passage when we could just buy a parelli book and teach the horse to 'shuffle'?
Believe it or not, it actually takes an immense about of strength and fitness on the horse's part to hold these movements, hence they are introduced only at the very top level of dressage, giving the horse YEARS to prepare with correct work and training.