I watched this spider weaving its web for about 10 or 15 minutes, back and forth across that top run several times. I would love to know how it accomplished its first run. And it had done did one or two of the runs down...so I didn't see it start anything. Nor did I see it finish. But it was interesting to watch. I don't want a spider on me, at all, at any time. However, I still don't especially like to hurt them.