Neville had thought it was practicing the Patronus charm for their auror tests that was doing it - the sweaty palms, the pounding heart, the nervous stomach, and above all, the thrill and joy in the air. Harry was just an excellent teacher, the best study help a mate could ask for, and the Patronus Charm he still hadn't quite made corporeal was powerful magic indeed.

But it only took one intense look of delight gleaming out of those bright eyes at their celebration to make Neville down his whole drink and reconsider a number of plans — first among them, seeing if some of these memories with Harry might be what he needed to make that Patronus come out to play, after all.