It was a fishing scale. It had a hook that I put on the string just before the G tuner, and I held it up from the scale with the bass dangling.
But just because it was supposed to be accurate, doesn't really REALLY mean that it was.
Like I said, it was super heavy. But I don't know that it was the heaviest one in the world. I figured five or six people in this thread should have beaten me.
Never mind. I went back and read the whole thread again. The guy right before me had one that was heavier than mine. Mine is no longer the record holder, and is reduced back to merely an enormous annoyance, in stead.
Order is restored in the universe.