Rule 240 

The rule from when American airlines were regulated by the government, stating that an airline had to make their "best effort" to get you on any flight, on any airline. (See tinyurl.com/327nqn for more info on what still exists as sort of a "Rule 240" in most airlines' Conditions of Carriage documents.

Airline} [said there was weather trouble in Dallas, so I used Rule 240.

Rule 240 by Shawarma123456765432 June 25, 2008

Rule 2401

It is physically impossible for a motorbike to be cool once it has obtained trunk space

JOE: Check it out BOB! I just got side Carriers for my motorcycle
BOB: Rule 2401
JOE: But--
BOB: THE INTERNET HAS SPOKEN!!!!!

Rule 2401 by TomSamos July 7, 2009