How about taking the cat away? and ground him for a week. or give him a time out a minute per age. In case he throws a tantrum because of it. which is always possible. Ignore totally and completely, and let him throw his tantrum. In the best case, he will get the message that screaming is not the way to get through to you. In the worst case, he will cry himself to sleep, and at least you will have your peace of mind. You know even as an adult. I Respect people who ignore me when I am out of my mind, more than people who whine, about why something I did or said was somehow wrong. The whiners I tell to **** right off, and leave me alone until they calm down and are ready to talk like people, rather than fight like cats with a mouse.