Neil and I saw it at the Goodwill store in Davis Square yesterday, when we were shopping for sound effects equipment (our haul included a broken bedpost and a beat-up leather briefcase, perfect for nice thwacking sounds. Now we just need some good reasons to thwack stuff!) It's a wooden stand with a painted wooden ball on top and a tripod set of legs on the bottom. There were ropes threaded all throughout. There was also a second one of these right next to it. We had no idea what they were supposed to be used for, and if Goodwill knew the secret, it wasn't telling.
Oh, you're welcome.