I would say opening a rift to the nevernever and flat out vanishing before someone's eyes is pretty near it. Calling up winds to come in from different directions, or making a tiny whirlwind. If I saw someone do that I'd be sold.
Actually, I'm pretty sure that, with modern techniques, good stage magicians in real life can duplicate the visual effects of both of those. If I saw them on a random street corner, I might be convinced (a good stage magician wouldn't waste the prep-work necessary for those kinds of things like that), but a fair number of people really wouldn't be.
Still, it's a goal, maybe not an achievable one, but progress could be made towards it.