In protection training, a dog needs to be able to handle a surprise attack or "pop out" in which the someone suddenly appears out of nowhere right in front of the dog and is directly confronting the dog. On the training field, most dogs will look great as they are fully aware of what is going to occur and, in fact, they realize what is going to happen as soon as you drive up to the training field. However, how a dog will react off the training field, when completely taken by surprise, is a completely different story.