Crop Circle Explained -- Already

I jumped the gun on wondering about the tape crop circle... Dave wasn't home when I got here - he and Lanie were out for an evening jog. They just got back, and it turns out Dave made the tape crop circle, because the boards feel loose in that area, and he wants Danny to take a look at it tomorrow and see if it's a problem that can be fixed. Sigh. Oh well, mystery solved.