Something cold and wet hit Bruce on the back of the neck as he carried a glass phial across the room, and he dropped it in shock.
"Tony!" He yelled, annoyed as he tried to brush snow from his collar, but only managing to knock more in.
"What?" Tony said innocently, sticking his head around the door.
"Please, stop programming your AIs to throw snowballs at me through the window!"
"As if I would do such a thing!" Tony protested, and Bruce raised his eyebrows. "Well, maybe you should shut the windows!" He suggested.
"… We're on the thirtieth floor!"