Sighing, Tsukune stopped running. If these people needed proof of his strength, he could get it a lot faster. "Excuse me." Walking over to the steel walls, meant to hold in any genetically altered humans, Tsukune held up his hand. Black carapace covered his fist, growing up to his shoulder. He breathed in and out slowly, as he pulled back the fist, focusing on this one punch. At a speed the human eye couldn't register, his fist sped forward, sending a bang through the room as it collided with the steel, a short shriek following it. When Tsukune pulled back his arm, there was a hole the size of his arm in the solid steel. He was tired from the punch, and the sheer force of it had dislodged his wrist, but he was pretty sure he'd made an impression. The strength to carry 850x ones own weight wasn't a force to be messed with.