"Proton pack, yes," Holtzmann nodded, glancing up at him with a grin "Just a happy little gadget I cooked up, helps us catch ghosts," she was still grinning, but her tone was matter-of-fact, it was clear she wasn't joking. "I'll go over it sometime if you like, it's some pretty exciting stuff." And she enjoyed nothing more than explaining all her wonderful toys.

"And theoretical physicist," she added, nodding in confirmation as to his first guess "Also, ghostbuster." she continued after a moment's pause, it was what everybody knew her for these days, she may as well own the title - even if it didn't quite have any relevance here. "How about you, enquiring minds want to know?"