Reggie didn't even initially realize that someone had walked in. He was too engrossed in what he was doing (actually cleaning out that damn plant from the back) that he didn't hear anything else going on around him initially. However, he did hear Mazie's voice, jolting slightly but managing to not bang his head against the roof of the car.
He came out of the hood with a giant grin on his face, obviously loving that they had actually provided something that he'd asked for. "They really weren't," he said to her. "Mazie, right? Good to get to see you in person," he said, wiping his hand on his jeans before offering it to her to shake.