Re: reaction to harness
When I was in grad school my housemate's cat had that same reaction to the harness. Eventually my housemate decided she was going to put the harness on and LEAVE it on until Autumn stopped creeping around and started walking normally.
A month later, my housemate declared, "All, right, you WIN!" and took the harness off.
Autumn is a stubborn cat, though. Most of them apparently DO quit with the "poor crippled kitty" routine eventually.
I would have loved to have had a webcam to see if Autumn kept up the "crippled kitty" thing when no one was home. I'm betting she didn't...