We are so used to see our teachers as models, guides or even heroes that we tend, consciously or not, to change our attitude towards them when we are on the mat. We are so used to be requested as Uke during classes (actually hoping to be called: what an honour!!), working hard to help our teacher to demonstrate his flawless movements and concepts that we often become constantly compliant. In fact, we often even tend to blame ourselves for any mistake made during the demonstration. Of course, it is a very useful and necessary attitude during classes and demonstrations but it is sometimes important to break this scheme, in order to set the relationship between us two to a different level. I personally take this as a way to "shake" our beliefs in our teacher, our own system and to reach a different understanding of the teaching we have received.