It could be a scene out of some spy or invasion flick -- flocks of ominous black military choppers fluttering over Miami's glittering skyline.
But this is no movie. It's been a reality for Brickell residents these past few nights, and they've been capturing the strange occurrences on YouTube videos with names such as Miami Under Attack.
Turns out it's a military exercise conducted with the Police Department's cooperation to stage potential defense maneuvers in large urban environments, according to the military, which kept the details under wraps.
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"We recognize this training has an impact on Miami residents and we appreciate your support during this critical training event," read a statement from the military.
The exercise ended Wednesday night. Here's a YouTube video.