[Crasher] I was going to say target, but let's face it. He wouldn't be able to help himself.
[Snow, for all that the Doctor usually gets to travel anywhere and anywhen he so desires, tends not to happen around him, at least not in a positive way. One might think that a Time Lord who's lived for more than nine hundred years (really, it's probably closer to a thousand), survived a Time War, and crossed dimensions would be uninterested in something as trivial as a snowball fight. One would be right ... with the small exception that, of the few survivors of the war, the Doctor happens to be the one who loves acting like a child.]
Ooh! Snowballs! Brilliant!
[And that's all it takes to get him in the snow, launching cold, powdery missiles with the unerring accuracy of a professional cricket player.]