Sjekk underbuksene ... 
http://www.avgeekery.com/time-boeing-717-went-inverted-testing/
During stall testing of the 717 program (formerly the MD-95), the aircraft departed controlled flight. That’s a nice way to say that the jet stalled, rolled, and went inverted. The test pilots on board masterfully recovered the jet and survived to live another day. Here’s the video proof:
http://www.avgeekery.com/time-boeing-717-went-inverted-testing/