My lesser spider has a wobble, and I'm very glad I had read about it before I purchased him. Knowing about it and encountering it for the first time is dramatically different, and I nearly dropped him when the first time I held him he immediately corkscrewed in my hands. He's calmed down a lot since then, but its still very obvious he has some neurological quirks. He's very mobile while I'm handling him, and a good half of the time his head is totally upside down (I'd post a picture, but like I said, he's very mobile). He also stalks his (frozen) food with his head tilted. Makes him unique, doesn't hurt him, gives me a chuckle every time I hold him.