A curious thing, when one looks and sees something one is fairly certain wasn't there a moment before. Sometimes it's easy to explain it away, like a bird suddenly perched on a branch or a blossom threading amidst grass: perhaps you had just missed it the first time. But this was different. This was a whole person, all in white. Mabel wouldn't have missed that, even if her observation skills were sometimes a bit lax. Without thought she waves one hand around, hoping to catch his attention, curious at to who...or perhaps what, considering the many strange things in this little town...this gentleman was. "Hey, hey you! You can't skip the city greeting committee-!" In her small hands are grasped about a dozen flyers for her Uncle's Mystery Shack, one of which she is tentatively holding out to him. "I have to tell you all about the greatest sight of Gravity Falls-"