On our way to our room on the seventh floor of the Budapest Marriott Hotel, we saw this object outside the (yes, seventh floor) hallway window:

It moved up and down, back and forth quite rapidly, seeming somehow both random and purposeful.

And no, it probably wasn’t a flying saucer. It was operated quite expertly by this man on a rooftop across the street:

And no doubt it related to the filming of a movie taking place on the street below–an amazing little camera gadget!