Dude. Who ever thought a leisure activity invented by dry-docked, off-season surfers would spawn an internationally recognized sport, a separate form of the English language and an entire fashion subindustry? The brains behind Swift Cantrell Skatepark in Kennesaw, that's who. Help make the first skatepark in Cobb County a reality by attending GRIND 2.0 at Rabbit Hole Gallery Fri., OCT. 10. Underground A-listers such as David Carson, Tara McPherson and Jef Aerosol will contribute skate graphics to be auctioned off to benefit the skatepark. While you're at it, buy a skatepark brick and your engraved name becomes part of the skatepark forever. Your place in skating lore will be assured. Free. 7-11 p.m. 195 Arizona Ave. www.swiftcantrellskatepark.com.