I posted this in another thread with the video, but will post here as well in case people look here first.

That video honestly reminds me more of pythons I have seen in respiratory distress (RI problems) than it does of the spiders and jags I have seen spinning. If I were to guess from that video alone, I would say your carpet has an RI, or is experiencing some other type of pain in its mid-body section.

I would like to know more detail about this animal directly from the person that owns it. Like, did that just occur one day, or is it still occurring? Any other info about how the little guy/girl is doing now? That just doesn't look neuro to me because the animal seems to have good head control, the spastic movements seem to be coming from the mid-body section instead...but I very well could be wrong.