Poor Krammer! Sounds like a seizure to me also. Ausin has them out of the blue. He tries to get to me because they frighten him. In the trying to get to me, he sometimes falls or stumbles into things and then just goes stiff with alot of shaking. I agree that a conference with your Vet is in order. If it is a seizure, Krammer has lots of seizure buddies on this forum and they would all tell him. Take it easy, you will be fine.