So i was bored and for about a half hour i watched a spider crawl around on a wall. I remembered reading about how spiders move on their webs by following the soundwaves of the fly they catch with their legs. And they also have little hairs that can detect sound since they don't have ears.
The spider i was watching wasnt on a web but i wanted to see if it would still notice sound. So i snapped my fingers in a direction different from the same circular path the spider had been crawling, and when i did the spider turned and started walking in the direction my fingers were snapping. Then i started clapping in another direction and it moved faster toward that sound.
So next time you see a spider and you're bored snap your fingers as close to it as possible but do it for a long time or it might not follow you.