2003's fall race at Texas saw one of the scariest crashes in NA open-wheel btwn. Tomas Scheckter and Kenny Brack(Brack's car touched wheels w/Scheckter's and went flying into the catchfencing entering turn 3)
http://www.youtube.com/watch?v=0Fg7hxxZaZs
2002's fall race involved a late-race dogfight btwn. Sam Hornish, Jr. and Helio Castroneves(IIRC Hornish won by 92/10,000th's of a second....
)
