That had to be it. They were dreaming. Or.... vision-questing, or accidentally blasted themselves into some wonky semi-lucid state. Maybe it really was August, and he just couldn't remember a bunch of months for no reason he could conjure. Or maybe Sirius's memories were the fabrications. Either way, this probably wasn't real. So, not much to worry about, then.
So James laughed as Sirius looked ready to do battle with his luggage. He laughed right up until he was nearly knocked over by a trunk of his own. Catching himself on another piece of luggage, he pulled up a smirk. Yeah, that one had his name. In his handwriting. Though, at this point, James wouldn't have been much fazed by a procession of juggling candlesticks singing out muggle show tunes. So. Back to the matter of the huffy baggage.
"You reckon we're supposed to... feed them, or something?" Pets were kind of like babies-- and whenever Harry got pushy, it was usually because he was hungry. "... or walk them, or something?"