How Do You Tell Your Dog Not to Move?

"I didn't know if it could be done because no one had tried it. And so it was really just a matter of trial and error," he says. "The hard part, as you know, is that the real scanner is really loud." The dogs don't seem to be bothered by the fact that it's an enclosed space,. So some people get claustrophobic about it, but dogs don't care about that.