I've posted about Aron before. He's the schoolmaster I got to lease for 18 months a couple years ago. He can do everything but ones (and the stars have to be in alignment to get twos). His piaffe and passage are excellent and easy.
The first time I ever rode Aron was in a clinic with Wolfgang. It was the first time I'd ever been on an FEI horse. During that first ride, Wolfgang guided me through everything Aron could do, including fours. I was thrilled! I clearly remember my first experience of piaffe. A thought flitted through my mind: "This would be about a four on the Richter scale."
Here's me and Aron working on piaffe. Good boy, Aron!