Came through Denver yesterday, was sitting in the RCC West and saw a -57 push back out of gate 24 at 10:20 with its Nosecone attached upside down! The Blue was on top and gray on the bottom. Wouldn't think that the radar cover would be symetrical. But why in the world would 1)a mechanic do that and 2) who QA'D the work to allow that aircraft out of MX. Me thinks a job statement is being made here.