Right on Friday I'm having the yard owner as my instructor as my normal one has booked the week off. But the thing is he really freaks me out! He shouts at me for doing what my normal instructor always tells me to do and if I do something wrong he wastes time by making me stop and doing it again even if I do the slighest mistake. He knows that I've got a problem with my right leg yet he always shouts at me to get my right heel down when I can't and it makes me really upset help what should I do?