Hi,
The spinning or wobbling in the spiders seems to be linked to the morph itself so yes you would expect to see it in bumblebees, honeybees etc.
It can show up independantly of the spider gene in normals etc - though whether it is the same cause is open to debate. But you get non-spiders that show the same symptoms. The reason I mentioned spiders is simply that, if a spider does it, you know its in the deal but if a non-spider does it you have a serious problem.
The snake in this case could have been showing the sysmptom as a final result of other problems as SiscoReptiles pointed out.
But with the little information we have at hand I would be more suspicious about the mite treatment or a sudden heat spike than anything else.
But only a necropsy would be able to find out when you get right down to it.
The only reason to find out the root cause would be to possibly prevent any problems with other animals.
dr del