My little Roomba vacuum was opposite me, having completed the living room, but it moved an inch, stopped, moved another inch, stopped, and continued that way. Normally, it would trundle off down the hallway toward “home,” but it was Inch. Stop. Inch. Stop.
What the devil? Was it broken? Something maybe caught in a wheel? But then I saw it—a large black house spider two feet in front of the Roomba, facing it.