If you’re not already out of the office or off the computer, enjoy a video that’ll get you in the mood for this weekend’s holiday. It’s the opening credits to “National Lampoon’s Vacation,” boasting a theme song that rids us of any regret we feel for spending the entire last month of summer indoors. Almost. Have a great puente, everybody. (That’s Spanish for three-day weekend.) Holiday roooooooaaaad!