I noticed almost directly overhead and an object that reflected sunlight. but it appeared to be spinning so, when not reflecting sunlight, i couldn't see it. this appeared to be very high altitude, well above the highest cloud tops. after seeing it shine a few times, i took out my phone and started recording and was able to catch it. toward the end of the video you can see it suddenly fly out of view at an incredible speed. i've included a photo where i show the object move across 3 frames within about 1 second (see "rapid acceleration to sw"). i've included the raw video directly from my phone also. see about second 36 and about second 46. i have two other videos that i couldnt find the object (not included here).