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BouncyNC10 makes the Notification Center launch animation bouncier
When you drag Notification Center down from the top of your screen, the interface normally just falls into place. The stock animation is a little boring, and some might argue that it could do with some additional creativity.
That's the idea behind a new free jailbreak tweak called BouncyNC10 by CydiaGeek, which adds an enhanced bounce animation to Notification Center as it strikes the bottom of the screen.
For a fair comparison, here's what the Notification Center launching animation looks like out of the box: