The Wyoming Incident (or The Wyoming Hijacking) is a lesser known case of television broadcast hijacking/hacking. A hacker managed to … all Â» interrupt broadcasts from a local programming channel (believed to serve several smaller communities in the county of Niobrara) and aired his/her own video. The video contained numerous clips of disembodied, human heads showing various emotions and “poses”. The camera position changed often (usually every ten-to-fifteen seconds) and the video was often interrupted by a “SPECIAL PRESENTATION” announcement. This clip is taken from one of these intervals.
The video is mostly locally well-known, and would probably not even be that popular if it were not for the effects it had on the few residents who watched it for an extended period of time. Complaints included vomiting, hallucinations, headaches, etc. While some believed it was paranormal, specialists have determined that the cause of these afflictions were frequencies played regularly throughout the broadcast. In this clip, the frequency being played is somewhere between 17 and 19 hz. This range of frequency, when played for long periods of time, causes the eyes to subtly vibrate, sometimes inducing visual hallucinations.
This video is significant in that is one of the most recent television hijackings. Such actions were rare even in the ’80s (search for Chicago Max Headroom Incident) and are even more rare today. The hacker has not yet been caught, and all attempts to trace the video have proven futile.
Wikipedia’s entry on Broadcast signal intrusion.