He was fascinated and completely interested in what this other was. He had to live long enough to be of some use to Shaw. There were a few options for getting him out from underneath the rubble. Cause small explosions or lift them. Some of the pieces may be too big for him to lift on his own, those were the ones he opted to touching with his palm and causing a small explosion. Not large enough to kill someone, but enough to cause the pieces of rubble to shatter.