Classic XKCD Web Comic #272: Linux User at Best Buy (described)

A web comic of romance, sarcasm, math, and language.

Panel One: Drawing of two stick figures. The one on the left, Salesman, is standing in front of a wall display and Customer is facing him.

Salesman: “Interested in updating your antivirus software?”
Customer: “Oh, I wouldn’t need any of that.”

Panel Two: Close up on Customer. With a spiky speech bubble, he declares “I RUN LINUX.”
Panel Three: Customer does a backflip onto a motorcycle.
Panel Four: Customer performs a wheelie on the motorcycle.
Panel Five: Customer does a hard donut turn on the motorcycle, kicking up dirt into the salesman’s face.
Panel Six: Customer speeds off on the motorcycle, leaving the salesman in a cloud of black exhaust.

Hover text:  We actually stand around the antivirus displays with the Mac users just waiting for someone to ask.

Warning: this comic occasionally contains strong language (which may be unsuitable for children), unusual humor (which may be unsuitable for adults), and advanced mathematics (which may be unsuitable for liberal-arts majors).

Comic by xkcd.com. Described by BlindGadget under the Creative Commons license.