Cold. Read the Q&A earlier in this thread or in the product question section. That might help.can this gimmick last a long time or does it need refill?
can the x's travel to the other hand or to some one elses hand instead?
Potentially, but I'm not quite sure how you would routine that. There are several variations taught in the DVD - the applications with this effect are limitless. The core presentation is the same as that used on the db special, but that's just the tip of the iceberg of it's potential.