I sure as hell hope they weren't applying a physics engine to the character models for this scene(and since I don't know what they model and produce with...) because if they
did, then we have a chicken-winged punch with screwed up footwork, above the shoulder,
no follow-through and very little rotation sending an average weight human backwards nearly end-over-end.
That's Makenouchi Ippo punching power right off the bat, when he's
bloodlusted, without any coaching.
If there's a physics engine involved, and its set to reflect our values for environment she'd be better off changing her name to mANNA Paquiao.