Chico and Love4himies, thank you so much for the quick and helpful response.
I swear we had been in the basement at least 20 times between the three of us, but I went for one last check, and he answered when I called. He had himself trapped in a stacked bedroom suite we have in the basement.
We normally don't let them down there, but I'll have to find a way to open that up.
Thank you, thank you, thank you.