Some years ago i stopped one of my students who didnt do a clearing turn in the middle of the airfield, but went straight into a transition. I stopped him and made him do a turn, just as well really as a C 130 on low level ops ( about 200 ft ) had mistook our airfield for a disused one 3 miles away and were using as a turning point. Can still see vividly ,the smile on the loadmasters face sitting on the ramp.