He wanted it all.

Everything in the entire city could be his, he had the gene, and the city seemed to react best to him.

It would be a simple task to take it all, if a simple thought could place something entirely under his control, imagine what he could do if he…
His plotting was interrupted by McKay, the scientist bouncing as he talked about something else he found, trying to talk him into activating it.
The amiable smile and nod of agreement startled the other man, John rarely wanted to play 'lab-rat'.
But he could always use practice.