Multiple reflective vehicles 'floating' over/behind buildings in a downtown brickell neighborhood in miami, fl in the middle of a bright, clear, sunny day. observer was looking approximately 40 - 45 degrees up from a 7th floor building balcony, straight north. a group of small, uncommon flying vehicles with no notable exhaust plume, no noise, and no wings, were floating slowly, in unison, due west, as they began reflecting sunlight beautifully, and individually, lighting up a random pattern among their small group. as the reflections disappeared, the craft would 'disappear' into the bright blue sky, no longer visible. craft would then reflect light again in a similar, random pattern a few seconds later, thus becoming visible once more, again only for a few seconds before disappearing, until the group had all flown away, and permanently out of view. only the last few moments of this was caught on a samsung galaxy s9, and only shows the very last craft, as it floats out of view.