[The warning about not destroying anything was completely forgotten once Thor saw the Jotuns. Why Loki kept relying on them was beyond him, but he'd think more about that later, when they were less of an immediate threat.
Spotting Steve and Natasha on the ground and hearing something else somewhere down the Avenue, he paused from going after his brother to dive into the center of the Frost Giants. The asphalt cracked and rose, wave like, as Mjolnir made contact, sending the Jotuns flying. It would at least give them a head start and he'd check on them, but Loki was more of a concern.
He didn't wait before he was in air again, flying directly towards his brother.]