Happy endings?

I watched PANIC ROOM for the first time last night (courtesy of channel 5, I remember when it used to just be smut smut smut...those were the best days of my life!) Although I moaned about the odd thing, "why did she do that? Would have been easier to....." etc I did enjoy the movie until the ending poked it's ugly head around the corner.
The movie ends on a sort of anti-climax, the music got all dramatic and then the screen faded to black. I didn't feel cheated, just mildly aroused! Then another scene strolled into the film, a pointless crappy scene that had no place in any movie. It was the HAPPY ENDING, the last shot should have been Jodie fosters' face covered in blood....but instead we get this awful,shoddy 30 second ending that had nothing to do with anything. It was just the mother and kid looking through a paper for somewhere new to live. I knew it was suspect, what had been quite a good film ended with a dodgy little scene that made me angry and go "what was that about"

SO of course I trundled over to wikipedia (im a bit of a freak,but you already knew that) and what do you know....the scene was added against the directors will because the test screen audience felt the film ended to abruptly. And so we end up with a happy crappy ending, and it's because of the soppy americans who needed a feel good ending, even to a thriller. The fools! The scene is a total contrast to the rest of the movie,the colours are a lot brighter...it's sickly sweet. It was put in because the audience couldn't cope with a ending that didn't tie up all the loose ends,and I bet 23p it was an american audience. I don't like to lump all americans into one category...but I just did!