Remember the original "War of the Worlds?" I wasn't there when it was first broadcast (Oct 30, 1938), but I remember people still talking about it 30 years later. It really shook people up!
If you don't know, it was a radio broadcast episode on Mercury Theater narrated by Orson Welles, an adaptation of H.G. Wells' novel written in 1898. But some people believed it was a genuine live news broadcast. Strange alien creatures and machines had landed and were taking over New Jersey. It caused some pockets of panic, reports of murder and suicide (unfounded), and probably was one of the greatest influences on pop culture.
This at a time when there was no internet and no TV. People's news of world events came solely from the radio, newspapers, theater newsreels, telephone (if you had one), and gossip. It scared the bejesus out of folks who had tuned in late and missed the opening announcements.
Anyway, I just remember how people still talked about it.
I remember people still talked about the radio broadcast of Orson Welles