Found a new way to spot hollow trunks before they split

I was doing a removal on a big silver maple in Dayton last month, the kind with a wide crown that people hate to lose. Tapped the trunk with the back of my axe and heard a dull thud, so I drilled a test hole about 6 inches up from the base. Core came out dry but crumbly, like brown sugar, and the tree sounded solid from the outside. Spent an extra 20 minutes setting a second rigging line instead of trusting the main anchor, and the top came down clean with no surprises. Anyone else rely on sound tests more than visual bark checks on older trees?

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