I just discovered it. They REALLY hate it. Okay, while they are standing/sitting, pick up their right front paw then hold it for a while until the dog's eyes glares at you. Then it will bark at you and will avoid you for a couple of seconds, depending how you raise your dog. If you tried to call your dog, it will turn around and dig with their hind legs or kick.

Another trick most dogs hate is pulling their tail. Grab their tail and hold it for a while. The dog will get really mad.

(Note: If you want to do the trick without getting the dog angry, do the trick until the dog's eyes glares at you then let go of the paw/tail. While the dog is still standing with angry eyes, stroke/pet the dog so it will get their minds off of their madness :D And if there are any tricks that dogs hate, comment about it.)