Rachael Alexandra's Haskell.
I know that it wasn't a monster field she beat, but it was my first Haskell and I specifically went to see her. About a quarter of the way through the card an absolute monsoon rolled through. I remember that horses went down in consecutive races. I really believe that if it wasn't Haskell day, they would have cancelled the rest of the card. I just kept waiting for the announcement of them scratching Rachael. Thankfully it never came and she ran a tremendous race. I still can feel the hairs stand up on my neck when a recall the feeling I got when I saw her head into the stretch with the lead. The roar from the crowd was deafening. That right there made up for what a crummy day (weather, betting etc..)it was up until that point. It was awesome.
http://www.youtube.com/watch?v=VwBVd4R5Les