Catwoman...It's interesting that you say that. My cats react the same way to an open doorway. They actually sort of back away from it. Maybe they remember their trips to the vet too. It's very hard for me to get them in the carrier for their appointment, but once we are there and he finishes his exam, shots, etc. they are thrilled to go back in the carrier. He explained it to me this way...."they think of the carrier as a tunnel to home once their exam is over." Apparently that's how they look at it because they certainly don't need to be coaxed to get back in. They can't get in fast enough!