Even tho the S-Hawk was able to repel Zoro away using strength, still S-Hawk also got afraid of Zoro's thug face and scary smirking of a threatening bully. He never experience someone trying so hard to make a scary face at him before.
...lol either that or S-Hawk got nervous at Zoro's strength so the child increase his own strength in response, finally managing to push Zoro away.
In the end Oda just want to hype everyone by rotation without actually delivering something