So many good candidates already mentioned, but for me it's gotta be at Auburn in 98'. Four downs inside the 1 yard line and the D didn't let em in. Raynoch Thompson bustin chops ! The Auburn fans around us (who were already asshats) were livid. It was glorious !
Another fun filled time was 2014 at South Cackalacky in OT. Following a great comeback by Dobbs and Co in regulation, we were held to a FG on our OT possession. It didn't look great for the Vols at 45-42 and the Cocks had their OT possession. But, Barnett and Maggit took turns sacking the QB, and the game ended with Spurrier sending out his kicker who was woefully short from about 60 yards. I nearly froze at that game, and I think I had a frozen smile on my face during the entire drive back to TN.
This was the first thing that came to me, definitely my favorite single series I can think of in my life (Casey Clausen and Mahelona being my earliest Vol memories as a kid). I was losing hope, but that series was exactly what we needed when we needed it. To have their game winning drive start in FG range and end OUT of FG range... Talk about your defense really taking the game into their own hands!
We had just taken the lead on the Jennings Tabor Burn long TD, and the first play of the successive Florida drive was when our D-Line collapsed the pocket, blew up the play, caused Appleby to run around like a headless chicken, then TKJr picked him off.
We then scored AGAIN 3 plays later on the Malone TD