"SNOW! Beautiful, wonderful, lovely, snow!"
"You're just glad we get to miss Herbology, James."
"Besides, snow's not nearly as much fun when it's shoved down the back of your robes. See what I m- HEY! It was a joke!"
...
"Remus?"
"Yes, Peter?"
"Do you think Sirius can breathe when James shoves his head into a snowbank like that?"
"Probably not. Should we be worried?"
"Probably. Should we do anything about it?"
"Nah. Oh, but I know what we should do..."
"Are you thinking what I'm thinking?"
"Enchant a bunch of snowballs to attack them mercilessly?"
"Yes. On three?"
"One...two...three!"
"AAAH!"
"GET THEM!"
"By the way, James, I thought the snowman look suited you quite well. Thank you for teaching me that spell the other day."
"Remus? Do you want enchanted snowballs released in the dormitory, spelled to attack you, at three in the morning?"
"You're one to talk, Moony. Your hair is so white, everyone'll think you've drunk an Aging Potion."
"I would prefer to avoid that, James. Sirius, my hair might be white, but at least my whole body isn't, unlike our esteemed Prongs here."
"Enchanted snowballs hexed to sing 'Odo the Hero.' For hours."
"James, that would make it just as hard for you to sleep as Remus."
"Shut up, Peter."
"Yeah, Peter, stop poking holes in James's Master Plans Of Doom."
"Besides, it's too easy. James's Master Plans are-"
"Of Doom, you forgot the Of Doom."
"Sorry. James's Master Plans Of Doom are like Swiss cheese, they're so holey."
"Shut up."
"Nice comeback, Prongs."
…
"James? I think you were right. Snow really is a wonderful thing."
"...I hate you all."