I watched Ireland vs Italy in 1994 on a delayed broadcast in Japan. I already knew the result because I had gotten it on the shortwave radio via BBC World Service with loads of interference. "Repub-shreeeeesdlakaks-and one, Itadlfkjljfaly -il" But is was great watching it with all these Irish people in Japan, with half the people knowing the score but pretending not to for the sake of the people who didn't know.
The worst has to be in the away end of the St. Jakob's stadium in Basel at 2-0, just waiting for the final whistle to blow so we could get the hell out of there.