Nero thought you had fallen prey to his technique. Being almost one-hundred percent sure he'd be trapped he was a bit shocked from your action. Seeing as you disappeared out of nowhere, Nero started looking around for your location. Looking to his right, left, then proceeded to look behind him. He didn't noticed you until he turned back around and looked to his left. He saw you as you released a couple of wind blast towards him. He smirked as this was only the beginning. Nero then performed a hand seal and started channeling and concentrating his water chakra into his mouth aiming to release out up to five bullets of water at your location. The bullets of water are shot at various areas that the wind was shot at, though it would still be enough to take down the wind also. However, the technique wasn't strong enough to continue on to you, merely canceling it out.
After getting through and countering your previous technique Nero would clasp his hands together and form a seal (Water Specialty), Nero then unleashes a surge of water chakra into the ground, pooling beneath your location. And in an instant a gush of water would have emerged beneath your right leg throwing it about, completely obliterating any sort of balance you had before that. On top of that to add on, the ground around the source starts smoldering, or as a better term, turning soft and genuinely fast into mud trapping one leg while the other is being flung like a rag doll.
Following up with the first clap of performing a seal he simply forms another hand seal keeping the hand movements of his fluid and without pause. Upon the hand seal torrent of water should then materialize around your location, being surged forward by a forwarding punch, unleashing a humongous wave of water easily capable of flushing you away while breaking slight bones in your body due to the force of the technique.