I agree with Claudia. I have experienced multiple induced hydraulic failures during training and subsequent check rides in the AS-350B2 and B3. The surprise factor can be quite startling. In most cases I experienced a significant level of airframe gyrations during my attempts to slow to 70Kts. There was also a mishap Apache Junction about ten years ago where I believe that the pilot inadvertently hit the hydraulic test button during approach to landing at night. A crash landing resulted where a medical crew member perished. A sudden hydraulic failure, in an AS-350, is not a trivial event.