Schitzo Mouse is a little but disturbing joke, totally free, that when run, makes the mouse cursor jumpo from side to side. That means you can`t select anything, as it is continually moving without stopping.
Schitzo Mouse requires no installing or any additional DLL to be run.
To be able to deactivate the joke (before your nerves explode) you have to take the mouse cursor to the program icon in the taskbar and click on it.