Do you mean mime-pulling the leash? I don't think it relies in it, but I've seen Stewart use that technique. That's the first time I'd ever seen it (and I've watched a lot of trainer videos).
@joosten0603 I don’t subscribe to “bat” as such, but I do the low level dog makes eye contact with subjects mark and reward and move away. I do think until the dog has the automatic response to look to handler once it see the trigger then I progress to what Larry does.