But, when I read the title and was waiting for the thread to come up, my mind was racing...
I thought you were going to show a side of the shopping cart used as a backup (reflector) for a Gray Hoverman or bow tie OTA TV antenna! -
Come to think of it, ya might not even have to cut up the cart...
...and you could fine tune by rolling it around on its wheels.
You know you're a redneck when.... you have a shopping cart available to use for a dish mount!
It does make sense - a stable, temporary platform for what appears might be an apartment setup where you can't do a permanent mount of a dish if your landlord even allows dishes.
Sure looks backwards to me, too! Difficult for me to really tell with the angle that the picture was taken from, but the perimeter of the reflector plate definitely looks wrong.