Sam.
I can tell how things work just by looking at them. There are a few people, my friends, that if I look too hard, that if I stare at them for too long, there's a part of my mind that wants me to rip them open, to pull them apart so that I can look deeper and figure out exactly how they work.
When I'm around Peter, it's all I can do sometimes, to ignore that urge.
My counterpart, the person that people think I'm going to become, gave into that urge, used this ability that we had to kill others who could do things like this, to steal their abilities for himself.
It makes me scared sometimes about using what I can do. But the more than I use it, the more that I understand it, and the more that I understand it, the more I will be able to control it.