The cottonwood seeds blow like snowflakes and leaves, dancing in the wind, showing the curves and eddies.   Also, when near a lake or flat area of a river, I can see the tracks the wind makes on the water.  "Cats paws"  they are called. You can see the lower parts of gusts laying tracks on the water.  When messing about in small boats  (sailboats, canoes, rowboats, windsurfers, paddleboards, rafts,...), your can seen the wind coming to you. 

In the winter under a streetlight, you can see the shadow of the each snowflake rushing to join the snowflake as it hits the ground.  In the summer, you can see your bicycling shadow cast onto the 3-d background of the bushes, grasses, and trees.  When I hike near sunset, I see my shadow cast from me on down the mountainside ridge down onto trees on the slopes below.  Because the sun is a large sphere, not a single point source, when you look at shadow of branches onto the ground or snow, the shadow has sharp edges when the branch casting the shadow is near to the grouond.  But when it is highe , the edges of the shadow are blurrier, as different parts of the sun are casting different parts of the shadow edge.  It is similar when you look at an solar eclipse shadow- the shadow cast by small holes like a from a colander  are sharp when you hold the colander near a piece of paper and blurry when you hold the paper away from the colander.