Dogs running for a Seasoned title in HRC see this kind of hand thrown diversion mark on a return routinely. Evidently, from the quote this dog was familiar with what was expected. In a test, the rules state it is OK to handle a dog to a such a diversion mark.
This is the first time the dog has ever popped. In this particular case, dog was returning from a blind and I hand threw a diversion bumper (which the dog has been exposed to several times before). After delivering bird, sent for the diversion bird. Dog put on a short hunt, then popped. Being a fairly inexperienced handler, I sat there for a minute hoping he would get up and get the bird, but was also thinking "what do I do". I finally told him to hunt it up (which he did), but did not think that was the correct thing to do. It also got me thinking how I would handle this situation on a mark from a winger.