If you do it correctly, it will work. It is not like the dog's alpha roll (where some dog owners are rough, and shake the dog and growl) If your cat is beating up on another cat, or doing something out of control, scoop him up quickly and gently. Kneel down, place him on his back, place one hand on his belly DO NOT PRESS HIM DOWN. And release in 3 seconds No more, no less. Don't make eye contact, and if he squirms LET HIM UP IMMEDIATELY. He got the message.