There had been a few seconds in the silence that Luna had been ready to tell him to forget about it. She had figured the silence was bad, until he agreed. Her hands, which had gone loose on his arm ready to be held up in a 'stop, no don't worry' fashion squeezed gleefully.
"I am excited," she exclaimed on a dance of her bare feet as they stood in the elevator. Luna was practically a lightning bug, maybe a star was better for her metaphor, glittering with joy.