The SEMA show is a giant gathering of automotive ideas and oddities. In this corner there's a chair made from exhaust parts and spare time. Over here, smiling through broken teeth, a Dodge Challenger and the Nevada state trooper who made sure it was at the show. Down the another hall, there's a motorcycle engine stuffed into a 1970s Honda. You'll find just about anything at SEMA, and if you're there, prepare to do a bunch of walking. There's no shortage of aftermarket parts and wild creations.