Hunter's eyes twinkled with mirth, "If you mess up the spell you will probably wish you had brought the umbrella out from it's resting place near the door. But no matter, it is a rather simple spell and if they're lucky, most young and uninitiated witches can get it right on the first or second go." Stuffing his hands in his pockets to keep the chill off them (or to stop himself from thinking about hands and holding hands altogether) he nodded in her direction.
"Of course. Just.. make sure you don't cast it whilst you're in the rain. It's better to cast it while you're under shelter like we are here than if you stand out in the downpour. It's just common sense, really." His eyes widened - as far as the unexpressive teen's eyes could possibly widen, "Not that I am implying you're stupid or anything.. Just think of it as a tip, yes?"