Interestingly there are lots of 'unusual' flight modes that actually stay aloft, especially if you are able to throttle up/down and move actuators very fast (ie. 10 Hz). I could totally imagine some existing planes being able to do some.
Quadcopter and drone hobbyists demo them sometimes. Eg. https://hackaday.com/2016/05/04/your-quadcopter-has-three-pr...