I got no thumb, but it grew back again.
You're never gonna keep me down.

The story:

One day my father runs in, singing that, with appropriate hand gestures and everything. He's terrible with song lyrics, so he compensates by getting very good at replacing them with his own. My friends just looked at him. My god, it was so funny. He then went on to replace the rest of the lyrics as well, but nothing quite topped that.