The Boulder sensed the two come up behind him. So much for sneaking. One of them was the fast one, the other, the small person.

"You must understand that the gene mapping is not yet complete and it is only a theoretical isolation." The Boulder had heard all that mumbo-jumbo before and wasn't interested. He had one shot at this.
"Uh, can we help you? Or should I just save some time and call 'stranger danger' already?"

The Boulder turned his head to the side to eyeball the new arrivals. The fast one, by virtue of him not being short, was a young man who looked kind of goofy. Coming from a man covered in bricks, the irony was not lost on Boulder. The short one was a young girl. "Why did it have to be a little girl?"

"Call it."

To The Boulder's surprise, the little girl started charging forward. If The Boulder had spider-sense, it would have been screaming at him, but since he didn't, all he expected was a kick in the shin. Until the tiles cracked under the girl. Something bad was about to happen, and the back of Boulder's neck started to prickle. The Boulder braced himself just as the girl struck. Her fist hit the brick on his bicep squarely and promptly shattered, sending rock shards out, most of which bounced off the girl's face without her blinking. The Boulder flew back into the wall, and saw the not so little girl anymore barreling towards him.

This is gonna hurt...unless....

The Boulder quickly formed the brick on his torso into a near solid shape, but instead of being braced by his body, he braced them with the wall behind him.

Train slammed into The Boulder and the bricks around him crumbled and shattered similar to the one she punched. Shards flew, cutting The Boulder on his torso, arms, and a few on his face, even as the wall exploded into a shower of fragments, dust, and sand as Boulder frantically broke down the wall to try and absorb the shock.

The Boulder lay in a pile of dust and rock tangled up with Train. Ugh...feels like I was hit by a Mack Truck. It hurt a little when he took a breath. A rib or 8 must be bruised...if it was broken it would hurt more. "Little witch..." Boulder muttered. Not sure what the effect would be, The Boulder punched Train straight in the stomach as they untangled themselves. Train fell over, winded and gasping for breath.

The Boulder looked a mess. The dust and sand had stuck to him where he bled from his scratches, and formed a thick, paste like substance on his skin. It looked almost like he was spattered with red clay.

Putting his left hand down, The Boulder tried to push himself up, but buckled and grabbed his arm where Train had punched the brick. There was a massive bruise forming, but it wasn't broken.

Boulder, still trying to get his bearings, got a vibration sense in his head of 8 more people running in the hallway towards the lab.

What now...? He thought.