I assume by "having a ball" you mean "kicking it around joyfully and randomly like a not terribly skilled three-year-old with a beachball" and all you can do is try to keep things from spreading out into oncoming traffic? :) Something like that?

My Severus over here just decided to take a bloody walk. A walk? Hermione and I are sort of gaping at him, open-mouthed, but out of the castle they go... *shakes head*

(I actually kinda figured out why he decided that now was the time to go for a stroll, but initially I was just... wtf? *laughs*)