Korean Sci-Fi SNOWPIERCER, is a piece of crap

This epic sci-fi piece by Korean dir./screen writer Bong Joon-ho (Host) takes place in the not too distant, apocolyptic future.  Scientists in a major blunder (oops) to solve global warming, cause the entire planet to freeze.  The earth has become uninhabitable.  The only survivors are the fortunate few granted entry onto a life supporting bullet train.  The sleek look of this high-speed train & artic landscape is pretty cool.  The train is fueled by an all powerful engine, OZ like figurehead & the backbreaking labor of the pre-ordained working class kept in the back of the bus.  Up front rides the priviledged upper-class who pamper themselves by day & party all night.  The  preposterous plot is a jumble from the Wizard of Oz, an Orwellian novel with indigent Dickens' characters tossed in the furnace.  A revolt ensues led by an unwilling leader, Curtis (a very handsome & heroic Chris Evans.)  His diabolical duo is played by a fiendishly delightful Tilda Swinton.  The actors aren't to blame for this lame film.  There are too many overblown fight scenes & improbable situations.  Once the fighting begins, the movie rides on thin ice.