He quickly analyzed the machine, then reached over to rip out something important and hopefully shut it down before the woman (probably Lucca's mother) got hurt. Obviously, his hand went write through the phantom lab without touching it, leaving him unable to change the fairly gruesome end of this little tragedy.

He came back to say something comforting to Lucca, but when he opened his mouth there were no words he could think of to say. He ended up just standing there looking sympathetic and kind of awkward.