If Johnny lost control of his powers it wouldn’t just be collateral damage. The odds were quite good that he’d bow up the entire top several floors of the Baxter Building. That would be if he didn’t blow up the entire building all together. A fact that he was all too aware of, and one reason why despite all his attitudes or flippancy, he never messed around with his powers. Ever.
When the pigeon went out, Johnny let the flames fall away from his body and return to normal with that trademark smirk on his lips as he considered his sister, and the heat she was giving off. “I’m voting for thinking too hard. She’s done that particular bit for as long as I can remember.” But, regardless of his opinion, he wasn’t a scientist and really didn’t have the first clue how to go about anything or even help.
So instead, he went back to his seat and flopped back into it and grabbed his bottle of Mountain Dew and took a long sip from it. He wasn’t going to go anywhere unless he had to. She might be a pain in the ass, but she was still his sister.