The man chuckled as he watched Tony pound the glass but it was useless. Pepper nodded to Bruce as she stepped back, but she couldn't hold back her scream when he broke down the glass. It shattered with ease and the man had backed away shaking his head at what was happening. Pepper had fallen down, finding it hard to breath with seeing Bruce in such a way. His body was huge to the extent that the his head had reached past the ceiling, his feet had sunken into the floor and she wasn't really sure if it could even hold his weight. Soon enough Tony was in front of her breathing hard as stood protectively still the man made no effort to even come closer. 

"I don't really have time to play games right now. But I'll be sure to come back later to play," the mysterious man spoke before turning and running towards the broken window glass. "W-Wait! This is the twenty ninth floor!" Pepper shouted, but he was long gone. "Tony... he has your data," she exclaimed with shock. He looked weak though this stress wasn't doing him any good either.