I'm Not William

Hey, dude, it's me again, William. Actually, I'm not William anymore. I'm E.T. from Planet X. If you want to know what I look like, I got a little mouth, and a big head. And a big chest and little bitty legs. And big huge arms. You might want to know what Planet X is. But I can't tell you because it's top secret. And here's a picture of myself: