It said in earlier chapters that his paralyze range is like 15 or 20 meters (can't remember). In either case, that thing only attacked the rock that Eve threw a couple meters away (it shows the exploded bits of the rock just feet away from the thing). There's no fucking way that math adds up. His range for paralyze would have to be like a mere 5 meters for it to get into his range as well, and we know it's at least triple that.