OS X Mountain Lion - When you trigger the Speech & Dictation dialogue, the fans on your machine immediately go minimum speed to prevent background noise.
iOS - The feature Speak Selection (on Settings > General > Accessibility) shows the characters of the fable The Tortoise and the Hare for the voice speed settings.
/via Victor Boaretto
iOS - When using internet on EDGE network, loading icon in status bar rotates slower than it does on 3G.
Nike+ iPhone app - The color coding of pace on the map is calibrated to the actual fastest and slowest pace ran.
Windows 7 - Multiple monitors that aren’t aligned cause the cursor to stop at the corners, but only if you are moving slowly.
/via Colin Dabritz