If you have a pet carrier for your cat, just set it behind the door so it walks into it after getting the door to open. Then lock him in it and set him back outside, facing your now closed door. The taunting of it could very well set him straight.
Who am I kidding? Cats refuse to be taught what they don't want to learn.
Who am I kidding? Cats refuse to be taught what they don't want to learn.