Worst/Stupidest Anime Plot Twist Ever! (SPOILER WARNING)

[GenocideHeart]

SPOILER WARNINGS APPLY. If you enter this thread, chances are you WILL be spoiled. I wish there was a spoiler tag that 'hides' text... I thought the 'Code' option was it, but nope. Try putting 'spoiler space' in your post, if possible.
Anyway, the title of the thread is self explanatory. Post your picks for the most awful, idiotic, nonsensical plot twist ever.
For me...
GUNDAM SEED DESTINY SPOILER!
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...it has to be when you find out, in Gundam SEED Destiny, that Mwu La Flaga has *somehow* survived his MS getting blown up and himself being exposed to vacuum. And they don't even givce you a decent explanation for HOW it happened.
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END SPOILER!