When working on an early version of http://recent.io/ http://recent.io/, I added a physics animation of bouncing/falling balls during the network request to the

When working on an early version of http://recent.io/ http://recent.io/, I added a physics animation of bouncing/falling balls during the network request to the server. When the network request completed, gravity pulled all the balls off the bottom of the screen. Some early testers liked the animation, but it turned out engineering effort was better spent on getting the backend tuned for better performance. Now the request for user-specific news is down to around 500ms on WiFi, and the physics animation has gone away. :)