Dean came up short as something taller than himself got in the way. He wasn't intimidated by size; he'd been living with someone taller and bigger for a while. He'd dealt with things stronger and possibly tougher than him for a lot longer. He was half expecting it to be Sam; that feeling of off he'd felt around Sam was what warned him, that and the size. Only, it wasn't.
"What the...?" Confusion was definitely the first reaction, followed quickly by anger and fear; they were often the same thing for the hunter. There was no way. His hand shot to the new knife, silver.
"What the fuck?" Dean started to sidestep. The guy could just look like that asshole; it could be a coincidence. Dean was hoping to high heaven if anyone was listening that it was some freak twin thing.