Sirius fought back the urge to smirk at Remus's outburst and ramped his look of wide-eyed innocence up a notch. "Wouldn't you appreciate it if someone took it into their head to drop chocolatey goodness on your head, Moony?" Not that Sirius had ever tried this. Although it was beginning to seem a good idea.
"Because I can't find Prongs and I'm not going alone," he said, lowering his eyelashes in mock sadness. "Do you want me to be lonely? No, I've decided. We're dropping things on the firsties. It's your choice - rocks, snakes, or cupcakes." He tapped a finger thoughtfully against his lip and added, "Snakes, actually, that sounds hysterical..." The implication: only you can save the firsties from snake attack, Remus Lupin!