I was in my parents old kitchen when I heard cat fight noises that were a bit scary. I went to the basement door & found my cat with a strange grey cat locked in battle except their heads were floating at about my shoulder height. They were attached to their bodies by something that looked like black string. My cat was looking pretty terrified. I didn't know what to do but push their heads down & onto their bodies. The cats broke up & the grey one said something. I quickly ascertained that the cat was a demon or possessed and I remembered a spell from something. I basically said, "Begone, begone blah blah (something that probably rhymed with begone)". The grey cat skulked away.