Is this possible? A bunch of flight instructors, CFI students and CFII students were stumped today when we were all looking at a graph that if I remember right shows the relationship between stalling speed and g-forces. The Graph shows that it is possible to stall while pulling negative G's. Or maybe that the stalling speed of an aircraft becomes negative when pulling Negative g's. Can someone explain this to me? If it is possible to stall while pulling negative G's, then how could it be done? We figured that since we all fly around in C-172's, that it would be damn near impossilbe to do for us, but maybe not for fighter pilots. What about pushing the plane over to quick into a dive? Or perhaps diving fast into critical velocity, so fast the the wings cannot produce clean lift? Can someone help me out?