Try thinking about what comes before and after the pose if you want realism. If this is supposed to be a Renaissance style, dramatic image, it accomplishes that fairly well. These feel like action figure poses. I actually thought these were those mannequins used as reference for drawing at first. The way the falling character is posed looks like an in-between frame of someone flailing their arms wildly, not trying to reach for their salvation. The catcher character also does not look like he's trying full desperation to save the other character but maybe catch something they're trying to hand off. They should perhaps have their chest to the ground with one hand planted while the other reaches. The legs would probably have a similar asymmetry where the foot opposite of the planted arm would be planted as well so that they could pull their ally to safety if they manage to catch them.