I had to do a bit of research on Yung Joc, because I had this feeling that he's doing stuff I wouldn't really be into. I was right.
Having purused the "It's Goin' Down" video, dude apparently has a dance called "the motorcycle". Hence, the motorcycle. The skeleton? Well, skulls are cool, why not a whole f**kin' skeleton. Folks are into skulls/bones/cartiage regardless of genre. This WORKS.