To say Dr. Octavius is greedy would not be accurate, but he is a little anxious to get his money and go, preferring to be as far away as possible before Daredevil makes his move, and/or his backup arrives. With the actuators blinded under his coat, he's left with only his own senses for self-defense, and they're nowhere near as sharp as Daredevil's are. His gaze has, inevitable, focused on the money, while he considers how to grab the suitcase and be away safely without looking too hasty about it. In some ways, it might have been safer to let them know just who they're dealing with. His response to the warning, then, is a distracted murmur of "Wha-?"

The actuators are blind under his coat, but not deaf. One of the lower claws plants on the roof with a solid thud, claws digging in a little, an instant before it lifts their host off his feet and pulls him to one side, the other three rising to form a protective cage around him. It's a cage with gaps, and they don't move as fast as a bullet, but Daredevil does hear a few ping off the metal plates, saving Dr. Octavius from multiple shots.

The guards on the roof, of course, are more than a little surprised by this display, and possibly surprised enough not to immediately realize the more serious threat is the now-free Daredevil.