In addition to making you look 1337, the shell enables you to use a computer more efficiently than any other interface. Command line interfaces have been improved upon for decades, becoming highly-refined productivity boosters.
This talk will take a beginner from "I don't even like to type" to "I don't need no stinkin' mouse!" by learning the coolest interactive shortcuts and the tricks for automating your life.
Bring your laptop and learn secret moves that will make all of your friends wonder "How in the Shell did you do that?"