If you want to see celebrities in bad instructional videos, Cracked.com tracked down some good ones.

They include Leonard Nimoy talking up laserdisc players in 1981, Russell Crowe in a college recruitment video for a Christian school in Australia and something from 2000 called'Michael Bolton's Winning Softball'.

There's also a "Celebrity Guide to Wine" video with Steven Seagal, Whoopi Goldberg, and Dudley Moore.  And a video we showed you last month of Vin Diesel breakdancing.

Five Celebrity Instructional Videos They'd Like You to Forget.

Here's Spock giving you an introduction to LaserDisc: