You and I will likely never understand exactly how it feels to bomb down Castle Hill on a skateboard, which is nearly as sad for our collective joie de vivre as it is deeply comforting to our insurance providers. All you really need to know is that despite its character ranging from million-dollar homes to interior design studios, the stretch of West 12th Street spanning both sides of North Lamar Boulevard from roughly Baylor Street to West Avenue hosts one of Austin's more vibrant and youthful skate scenes, a sentence that makes me feel pretty old just for . . .