I had to Google that. It was in the 1997 season, back when they were divisional rivals and the Jaguars were good. Jacksonville was up 23-21 when Pittsburgh attempted their ill-fated field goal. The only difference is that OT would have been impossible.
I tried to find it on youtube this morning and couldn't find anything. Of course I didn't remember what year it was or anything else about it except the ending. I'm glad you found the info so that I know I'm not completely crazy. Jacksonville was pretty good for a few years back then. They may have even played in the AFC championship game once or twice (although I'm fuzzy on that). I think Tennessee was good too in those days.