The one that instantly popped into my head was Liverpool 3-3. I was 7/8 years old completely hooked as a second season ticket holder and could feel the buzz around the place with all these superstars, although I didn't fully understand the relevance at the time I still knew something big was happening.
After spending a little time thinking about it, i'd like to go to any Ayresome Park game. I only ever went to Pears testimonial but don't have any real memories of it. I do strangely enough have a very vivid memory of going to get the Blue/Black Cellnet away kit from the Ayresome Park shop before The Riverside was complete though, weird what you remember isn't it.