oneko -tora
I love that cat https://en.wikipedia.org/wiki...
I worked for a college and managed their web server. One april fools day I modified the config to inject javascript time that would plant oneko on the page chasing the user's mouse ~1% of the time for on-campus users. There'd been some windows virus in the news around the same time and I was asked to take it out pretty quickly. Ah well.
@roue best of intentions, worst of timing