Sivuca is a very calm instructor and knows when and how to tell a pilot what he should pay attention to care about his (her) techniques; hence, he will be the first person to tell students
when he feels that one should be a little more daring.
This instructor is not only theory. He is an acro pilot himself and everything he teaches, he is also able to perform. He is then able to tell exactly what any learner should do in order to
improve his flying technique while he always knows what he is talking about. On the other hand, Sivuca will be humble enough to tell you that he does not know the answer when that is true.