I guess this has to go in Lounge. Oh well.
I've always been a supporter of the idea that 'if this is the last film of the franchaise, mess it up as much as possible'. Lord of the Rings' bed jumping scene was a good example but I was thinking more along the lines of destroying the entire premise of the film in one shot.
Like for example, make Harry Potter end with.... (no spoilers here just nonsense):
Harry Potter wakes up
It was all a dream
Would completely make my day. What do you think of my idea of endings? Brilliant huh?