How did it get there?

You know those colorful pennants you see at the grand openings of banks and gas stations? The plastic strands with red, yellow, blue, and green triangles that flap in the breeze?
There is one tangled in the top of a tall beech tree in my parents' woods. How did it get there? It's unlikely that it would have blown up there, because it would have caught on many other branches en route. But what aircraft would have dropped such a thing?
My mother thinks there is some kind of writing on one of the triangles, but even with her binoculars she can't quite decipher it. As you might expect, it's driving her crazy.