Today's surprise came in the form of a drastically uneven section of the kitchen floor.
So he cut out the offending hump and found water damage in the subfloor from the water heater that used to be in the pantry. He basically had to cut out the swollen particle board and replace it with plywood. Now the hump is gone, or at least will be when he finishes it in the morning.
So they called it a day and we were able to let the kids run around downstairs. They have been cooped up on the second floor for what seems like an eternity to them. Mason celebratorily decided to knock me down on the ground and Jen had the quick wit about her to capture it on film. Thanks, honey!
Onward and Upward tomorrow!