Poison does a backflip into a handstand then lands on her feet. All the while she is retreating from her opponent.
Backflip is one of the reasons Poison can be hard to pin down. It is invulnerable until she lands on her feet again in the animation. This can be used to avoid whole Super and Ultra combos. This combines with her 21 frame backdash and Kissed by a Goddess, it can be very hard to pin her down. Players can use this against attacks that have very long recovery to avoid then punish.