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One Lap of the Web: Aston Martin Works, 'Gran Turismo' movie and the Mercedes-Benz S-class build process

We spend a lot of time on the Internet -- pretty much whenever we're not driving, writing about or working on cars. Since there's more out there than we'd ever be able to cover, here's our daily digest of car stuff on the Web you may not otherwise have heard about. -- Along with the “Need for Speed” franchise, the “Gran Turismo” series may be the latest in line to make the leap to the big screen.

Citroën Cactus concept with Air Bump technology confirmed for Frankfurt debut [w/Video]

Citroën's Cactus concept featuring a mysterious sounding 'Air Bump' technology will be taking center stage at the carmaker's stand at this year's Frankfurt motor show. The carmaker has released just one image of the concept along with a 21-second video (see left) showing a spongy panel labeled ‘Air Bump' being poked. Although this doesn't really tell us much about what this new technology actually does, we suspect the panels featured in the video are inserted into the bumper and can protect it from the smaller-scale collisions that can happen in everyday life.

Video: Autoweek thrashes the 2011 Porsche GT2 RS

Join Autoweek senior editor for motorsports Mac Morrison and road test editor Jonathan Wong as they put the 2011 Porsche GT2 RS through the paces at GingerMan Raceway in southwest Michigan. They take a closer look at what makes the car so special, and they get behind the wheel to find out for themselves. We'll bring you the GT2 RS VBox lap later this week, and stay tuned for Lexus LFA track action coming soon.