I woke up because there was a ladybug in my ear. Now I can't sleep and am checking my ear every 30 seconds. It's because a recent episode of "This American Life" had a story about people who get cockroaches in their ears. They have to go to the hospital, because the roaches can't turn around in the ear canal. Luckily, the ladybug wasn't in my ear canal; or if she was, she was small enough to exit, and I caught her on the way out.
I bet in some countries a ladybug in the ear is a good omen.