Chuck's Reviews Transformers Rise of the Beasts Flex Changers Nightbird
 

Well, this is something new. Hasbro continues to innovate, for better or worse, the simplified one-step conversion with the new Flex Changers. Transformation revolves around rubber bands that connect the panels that have to move for transformation. In the case of Nightbird, you end up almost turning the figure inside out. Unfortunately this new design results in no articulation whatsoever, but the tactile feel of transforming Nightbird back and forth more than makes up for it.

http://www.youtube.com/watch?v=6qtRH9uvvZ0