Bucciarati's gang just saw you destroy an enemy stand user in a yoctosecond which is a septillionth of a second. They couldn't comprehend how powerful you were and they didn't know that you destroyed the user in a yoctosecond because they didn't know it existed. What made it even more impressive was that you were an incredibly beautiful woman and the powers you displayed when annihilating the enemy user looked like they came from a video game. MUGEN specifically. You also had no Stand or a Hamon