I wouldn't say it was the most "thrilling" but out of all the games/sports events I have been to in my life, the most UNFORGETTABLE was in 1999 in Arizona - Niners at Cardinals - Steve Young's last game.

As you know I am a huuuge Niner fan and became quite a fan of Steve Young over the years though it took me a while to warm to him after losing Montana. But when he went down that day and didn't get up for what seemed like an eternity - my friends and are in Row 9 mid-field and can see everything - it's just still etched in my mind. Niners went on to win, but it was a bit of a bittersweet win since noone really knew how bad his injury would be until later.