My cat is indoor and he got out once by accident and now all he does is cry and stand by the door or near the door trying to sneak out. He just got out 5 minutes ago and by had had to chase him and grab him. My dad got scratched by his back claws. How do you discipline my cat, or show him he's not supposed to go outside. I don't understand why he wants to so badly. My other cat doesn't care about going outside, but my one who does is so stressed. What should I do?