Like Chuck said, they are made to get some scratches and get back in the air. As for your instructor, I have seen things like that happen A number of times and so far all have been lucky without anyone getting hurt. When A student gets to A stage where all the instructor is doing is holding A switch every flight, sometimes the brain goes into that gray area. So far I haven't done it but sometimes I need A little shake after A students flight to get my brain back in order. Good going on your first landing too, A no bouncer!!! I was always just happy my plane still had all it's parts on after A landing. Still am!!!