"I always believe in being prepared," James said. "Feels like I'm always 'on.' Turning that off is not the easiest thing." He could look at this place, this time period, as a break from reality - but he didn't plan to kick his feet up and relax all the time. That would mean letting his guard down, and that he would never do. There were still aspects of this cluster to look into and discover.
But he let Mikaela touch his arm (the red star, originally put there by the KGB, had been repainted to pay homage to Cap's shield after he regained his memories), not protesting. "Removing it and putting it back on is kind of an ordeal - but I don't know, it's some kind of cybernetic implant. The tech was always upgraded as it became more advanced. It does some cool things though, like I said."
He made sure she (or the robot) weren't in the way, and flipped his palm up - sparks flew, literally, a current of electricity before zapping off again.