Good question. I am at level four on the athletic skill and a double-tap back does not produce a back-flip. I just figured that this was another broken feature.
No, a back flip is walking backwards while hitting the jump button. It does indeed work.
Listen up maggots, Mr. Popo's 'bout to teach you the pecking order.
It goes you, the dirt, the worms inside of the dirt, Popo's stool, Kami, then Popo.
~Mr. Popo, Dragonball Z Abridged
