Continuity mistake: In this episode we learn that Barney doesn't know how to drive. But throughout the whole series there are reference that he actually does, such as: In 'Come On' (22nd episode 1st season) : Penelope says to Barney: "We had sex twice in your car." In 'Moving Day' (18th episode 2nd season) : Barney drives away with Ted's rental van. In 'The Bracket' (14th episode 3rd season) : Barney stole Holly's SUV as they were camping.
Suggested correction: This has been corrected before. Barney does not know how to drive at the time of the subway strike in 2005, but does learn how to drive at some point shortly after that. And it's not until Moving Day (the very episode after this) that we see Barney driving. He does not have to drive in Come On, he just has to own a car.