Gilbert was so serious lots of the time. Zach hadn't exploded stuff very much in his time working for Gilbert. He didn't try anything without a lot of background work. He was thorough. But he did like the pure fun of explosions. It was like the jolt of adrenaline from quidditch.
Then Gilbert brought up more work, new work, a new charm?! A new charm! From scratch? And he was only twenty! And to help with that was the most exciting thing Zach had heard in a while! His whole face had lit up. "I would love to help you with that, Gilbert!" Zach exclaimed. Trying to change things was exciting, but that, Gilbert was amazing.
He looked over at Romilda, as his attention caught the topic of conversation between the witches. Romilda had instantly known about Cedric. He hadn't told anyone, but he had started telling her everything. He was at risk of not being able to stop smiling, by natural causes.