Mello saw it standing there, and, to my astonishment, decided it was a giant hamster wheel. So she immediately jumped in it and began running.
This was a disaster in the making.
She actually got it about 20 feet across the yard before the whole thing fell over upside down, trapping her under it.
It was pretty hard not to laugh at the muffled "woof" of astonishment as I went over to free her.