I have developed a great educational device that I use with my new basketball officiating students to break them of the bad habit of using incorrect mechanics and hand signals such as using the foul tip signal. It is a device that they wear and every time the student uses an unauthorized hand signal I press a button and they receive an electrical shock in a strategic part of their anatomy.
No, I really do not have such a device but I tell them that I do. But I wish I did, I could cure a lot of officials of using unauthorized hand signals.