Hah. Consider yourself lucky. I worked at a Pet Resort for a couple years and practically every Shiba that stayed with us was hyperactive and bitey. They would nip other dogs (that's how a lot of them play, but it really pisses some of the dogs off) and then jump away, almost teasing them. If you ever needed to put them in time-out, they would give you the run-around until you finally managed to catch them (which usually required two people) or gave up and had to go do something else.

They are by far the most adorable breed IMO but they tend to be stubborn and hard to train. If that description is nothing like your dog then you are very, very lucky to own a calmer Shiba (assuming you would rather have calm over crazy).