‘nother clip from Future Shock:

http://video.google.com/googleplayer.swf?docId=-5721823002291867425&hl=en

via

The funny thing is its still being predicted. In fact, in a recent NeoFiles ep – R U Sirius mentioned it as a easy genetic hack – quoted here.

This also brings to mind an ep of Mork & Mindy where Mork got revenge on a bunch of racists by turning their skin different colours.
(Sadly – YouTube seems to be lacking on the Mork & Mindy-clip-dept.)