I always found it amusing that my roommate's cat enjoyed playing with the hair-ties he found around the house... but today he is playing fetch with them. He brings me a hair tie, drops it next to me and sits and looks at me. I pick up the hair tie and throw it out across the room or out the door into the kitchen, and he chases after it. A couple seconds later, he plops it down right next to me, and looks up at me again. I had a dog when I was a kid, and she didn't play fetch, but my cat does? I suppose it's possible that he's not really playing fetch and that I'm annoying him greatly.