The important thing to note about this is that the spider was still able to get where he meant to go, he was alert to his surroundings, and his reflexes were fine as well--he just seems to not always be sure which way is up.

This is part of what makes the 'wobble' distinctive from neurological issues such as stargazing.
I've not seen a spider in person quite as severely affected as the one in this video, but they can be.