McKayla is not impressed with random images as you browse the web.
A Chrome Extension that randomly overlays the [in]famous 'McKayla Is Not Impressed' image over other images while you browse. McKayla can be found on approximately 20% of images - a number I like to refer to as "the McKayla threshold."
Prank your friends by installing it on their machines when they're not looking!
Download available here: https://chrome.google.com/webstore/detail/bigmiaijamgkhfbdolkjagnkppjgccne
Also, check it out - it's featured on Mashable! http://mashable.com/2012/09/10/mckayla-maroney-chrome-plugin/