I just finished watching an old movie, The Swan, with Grace Kelly, Alec Guinness, and Louis Jourdan.
It had a sad ending! I fully expected, after the comic elements, that Kelly's princess would end up running off with Jourdan's tutor. But he left, with no expected dramatic return, and the princess turned to Guinness' prince and said "Take me inside Albert" and they walked away togeter.
Huh? Well at least it wasn't a cliche.
What other movies have ended up without the ending you fully expected?