"Oh, I beg to differ," Percy said, sounding a bit superior now. "I've read all about Muggle narcotics and I'm quite aware of their effects as well as negative side-effects. There was a course given by the Department of Magical Law Enforcement one year, after some Dark Wizards were caught trying to peddle Muggle drugs in the Wizarding World." The way he spoke made it sound like Percy considered himself somewhat an expert on the subject.
"You won't be doing any bad things," Percy assured Greg. "Goofy things, perhaps. But not bad. In any case, I won't give you enough for you to behave completely irrational. I actually don't have a lot left. Just a taste..."
Turning his back to the crowd, Percy reached into the pocket of his trousers - he kept his stash of chocolate on his person at all times. He did not trust leaving it in the communal living setting of the Vaults, where somebody might just rummage through his belongings and steal it. He didn't want anybody to see what he was doing as he opened up the small, used tin of mints that kept the chocolate safe and fresh. And although he wouldn't readily admit to anybody, Percy got a secret thrill from thinking that he was doing something 'naughty'. The chocolate wasn't precisely illegal, but the way he hid it from everybody gave Percy that same mood.
Percy opened the tin and inside there was a small block of the fudge. Smaller now than what it used to be, there were fingermarks where shallow marks where Percy scraped or broke off a tiny piece. With his finger nail, Percy scraped a small portion, which he then rolled into a little ball to hand over to Greg: it had to be less than a millimeter in diameter. He then divvied the same portion for himself. "Cheers."
Percy popped the fudge onto his tongue where he let the chocolate melt, enjoying the taste and the sudden burst of euphoria that came it was first ingested. A happy smile stretched across Percy's face and he actually chuckled, despite himself.