John Carpenter's 'The Fog' was on the other channel...
I remember this distinctly because I was at home by myself that night, back in 1992, 15 years of age, by no means of a nervous disposition and thinking that this was a real documentary.
I actually missed a few minutes of GhostWatch because some scenes (the girl talking in tongues, Pipes at the curtain etc.) scared me so much that I was forced to change channels for a breather and in comparison, The Fog, which is a great movie in itself, was like watching the TeleTubbies.
I've since watched it again and sad to say it hasn't really stood the test of time (or my age) because while I still enjoyed it the poor acting from Sarah Greene et. al at times is pretty laughable. Still this had no bearing on me at the time which is testament to the effect it had.
If only they could make horror movies that had this sort of effect these days, sadly I think society is so desensitized we're unlikely to see anything like this again.
Having said that, anyone who was a fan of this should check out 'Rec' or 'Inside' if they haven't already as they are both vaguely comparable in some way.