The moon creeps over the sun gradually, and when the sun is almost concealed, you'll notice blobs of light appearing on the edge of the moon. No, these aren't martians having a gun fight, it's just the sunlight shining through the valleys, chasms and mountain peaks that are on the moon. The moon creeps even further across the sun until there is only 1 large blob of light left. The moon completely engulfs the sun. Two total eclipses with the corona blasting out from behind.
Birds stop singing, and a cold breeze blows through the trees.
After about 2 minutes as I said earlier, the moon starts to reveal the sun, with the effects mentioned above going in reverse order.