[EricH]

If you were to lean a triangle tube up against the field border, let's say on the inside, and the top corner was over the field border, is the tube now outside the field? Would you say the same if the tube was suspended in the air by some means, say an updraft, and not otherwise moving?

Now let's put the tube on the outside leaning up against the wall, same conditions otherwise. Is it now inside the field? How about if it's suspended?