It is hard to get emperical data on the "cat following" something phenomenon, unless you are absolutely sure there are no floating dust balls, or
bugs flying around. Once you are sure of that then you can watch your small little pets with impunity !
I have had a similar experience myself :
www.abovetopsecret.com...'
except that ive had alot of other stuff happen as well.
hopefully someday we can come up with a scientific way to explain what is going on. EVP has some info on that, but some of the stuff they present is
kind of suspicious so will take some time before it gets sorted out.