To Tony's credit, he didn't jerk away. Whether that was due to a certain lack of appropriate response to danger he possessed or an utter unwillingness to let Pepper go or perhaps a combination of both was unclear.

He looked down at the flames licking up Pepper's sleeves with a look of... mostly confusion, really, and mild alarm. Well. That was new. Tony Stark was known for his razor-sharp wit and intelligent quips, but no joke sprang to mind now. Pepper was a constant, someone who could surprise him but only in certain ways, someone who was a lighthouse in the storm that was his life, and Pepper did not just randomly burst into flames.

A questioning "Uh, babe?" was all he could muster.