Interesting phenomenon: Spider influenced by the magnet in my finger
I was at work and found a small spider in it's web. I was curious to see if it would react to a magnetic field and it did! As I moved my finger back and forth, getting no closer than about 3 inches, the spider and the entire web responded by bouncing back and forth away from my finger. It was almost like watching a speaker vibrating.
So I looked it up and as far as I can tell nobody has researched this. I found one person asking if spiders reacted to magnetic fields. He had setup magnetic fields around some spiders and left another group of them with no field and apparently the group in the filed produced significantly more webbing.
Anybody else find weird or surprising things with their magnet implants? I'd also like to know if it can be replicated. I only found one spider. Maybe certain species use the earths magnetic fields to guide their web making.
I might be mistaken, but as I remember it your description would fit the normal "fear" behavior of a spider whenever an object comes close, that isn't prey.
* Spider webs reach out to flying insects, "Not Exactly Rocket Science" blog, July 2013