TV pirate transmission from 1987

Headroompirate
In 1987, a TV pirate sporting a Max Headroom mask broke into the broadcast of a Dr. Who episode on WTTW Chicago. I wish this kind of thing happened more often!
Link to YouTube video, Link to background in this 1987 issue of Tolmes News Service (Thanks, Coop!)

Update: Sean Ness points to a Damn Interesting post that details the Max Headroom TV pirate's earlier exploit that same day when he interrupted a WGN-TV News broadcast. Link

Update: BB reader Sean Russel points to the vintage 1987 CBS news report on the pranks. Link