In my house changing the sheets on the bed is good for a laugh. The cats have always thought of it as playtime. First Emily loves to chase whatever is moving when I'm trying to remove it. Then she loves to get underneath any layer that I'm putting on. Midnight liked to sit on top and bat Emily as she scooted underneath. It's really hilarious when three cats are playing at once. I don't have a camcorder but here are some examples of what I mean from the web:
Fortunately I don't have this problem:
It was a lot of fun writing this post. I've found my cats don't participate as actively as some cats, meaning my sheets may last a little longer.