Quote from : The Living Dead Book

There was something about clowns that was worse than zombies. (Or maybe something that was the same. When you see a zombie, you want to laugh at first. When you see a clown, most people get a little nervous. There's the pallor and the cakey mortician-style makeup, the shuffling and the untidy hair. But clowns were probably malicious, and they moved fast on those little bicycles and in those little crammed cars. Zombies weren't much of anything. They didn't carry musical instruments and they didn't care whether or not you laughed at them. You always knew what zombies wanted.)