CrashUrPC
By ConwayTech
Run this at your own risk. Even though this program doesn't permanently damage your computer (assuming you're not using IE), it could really annoy your friend or delete unsaved work. I am not responsible for such things.
Click here to initiate CrashUrPC using WindowCrash.
How It Works
CrashUrPC opens over 1K+ windows and 1K+ tabs, some with the URL of about:blank and some with the URL of the "Crash Page". This overloads the RAM on your computer. For maximum CrashUrPCing, use Chrome.