Vince Vaughn deserves better than this terrible comedy about a small business owner and his two stupid associates (Tom Wilkinson and Dave Franco) who travel to Europe to close the most important deal of their lives. Sounds like a setup for a wild, raunchy ride. But the air goes out of that balloon pretty damn quick. Ken Scott, who previously directed Vaughn in the disappointing but slightly better “Delivery Man”, tries futilely for laughs and tears. Unfortunately, nothing works. Nothing. “Unfinished Business” is one joke stretched to the breaking point. I couldn’t stand it.