In the 80s some people pirated a local tv station signal and broadcasted some crazy stuff in a Max Headroom mask. They did two broadcasts in one night First was on WGN news and the 2nd was on a Dr. Who broadcast on WTTW.
Here's the 2nd with subtitleshttp://youtu.be/2F_DE5UgH3M
Here's some news reaction to the whole thinghttp://youtu.be/3NteORzWN7o
Some cool local history and that would freak me out. I vaguely remember the whole thing, I was only 5 when it happened. I do remember having a weird dream as a kid where some masked figure was talking to me from the TV... but that could've been related to all the videogames and horror movies I watched back then.
They never caught the guy, which makes all the posturing on the news reaction video hilarious.