Dry skin has a very high resistance. To get through it, you're going to need a pretty powerful laser that will need to be sustained on the muscle for as long as you want to keep the person immobilized. Too much of this, and your target is going to start getting cooked.

The bag of ionized water that the skin keeps in shape has a very low resistance. If the laser hits an arm or the head, the shortest path to ground may well be through the heart and diaphram, which is undesirable.

I'll believe it when I see a URL pointing to something coherent.