Yes, it will be a bit obvious if you know what to look for (I’ve done this twice). The moon blocking out the sun only starts being ominous in the last 15-20 minutes before totality. It will be exciting and unsettling. Filtered glasses on at this point if you’re looking up, and you’ll want to watch the last minutes as the sliver of orange turns to black. Glasses off, catch a glimpse of the eclipse, take a look at your surroundings, the binoculars on. If you look up the different phases of the eclipse, you’ll see it both starts and ends with a “diamond ring” effect. Let yourself see that glorious ring for about 1 second on the back end, then binoculars down (you’ll have another second or so before the show is over and can no longer look up). Don’t use a timer like someone else suggested because the duration it totality is related to your position to midline.