Flying NDBs upside down?
Reminds me of a flight on RAAF Pilots couse in the Macchi. Was doing a mutual with a course buddy - me in the back seat. We did a Pearce 260 departure - a pseudo SID where we just flew outbound on the 260 radial. He briefed he would do it inverted. Once on the intercept heading he rolled us upside down - was quite amusing watching him trying to sort out which way he had to shove the stick to roll onto the radial. actually, I think he did it better upside down than I could do it right way up!