We were in clemson, sc observing the solar eclipse with some family. my husband was video taping the event which occurs around 4 and a half minutes into the video. we first saw an airplane (of which we'd seen many before this, but just one is on the video) that took a long time to fly towards us and away. after the airplane my husband saw the ufo drop straight down out of the cloud that was covering the eclipse. that was when he brought my attention to it. as you can hear in the commentary i at first thought it was a bird, but quickly realized that was a mistake. it had no sound, and moved so smooth and quick. it was really hard for my husband to keep up with in on the camera. once the object dropped it stopped and then moved northward in what looked a straight-line. my feelings when i realized what i was witnessing was overwhelming and exciting. i felt nausea for a minute but it quickly passed. there were trees lining the driveway we were in and when it went behind those it disappeared. i moved around them to see where it went, but it was just gone. also, the north part of the sky did not have any clouds so it didn't just hide behind a cloud, it just disappeared.