Mine was 1992 against Ohio. It rained non-stop but we had no trouble putting away the Bobcats. Ahh, the bad old days...Jim Walden, astroturf, yellow helmets, and celebrating if we got a tie.
mine was vs iowa in 99. we won 17-10. at the time i rarely even watched football. i was even (gasp) an iowa fan (simply because all of my friends were hawks and i had no allegiance via parents/family). i sat in the south endzone right in the middle. caught an extra point that was kicked into the stands. that was very cool as a high schooler (however i did not get to keep the ball).
then i attended iowa state the following year and the rest is history. i hate the hawks now.