This one was voted as greatest individual NFL performance, ever, not just Dolphins, by ESPN many years ago.
I remember it well. We were up huge, then Pittsburgh made a BIG comeback. Late, late in the game, Miami's ball, Pittsburgh had us close to the goal line and they were behind by maybe 3, anticipating getting a short punt and good return. It looked glum; momentum had swung HARD in Pitt's favor. Shula had Griese run around, burning as much time as he could, and take a safety. At FIRST, the MNF guys (Cosell, Meredith, Gifford) were like, "Oh, MY GOODNESS IS PITTSBURG POURING IT ON" ... then it dawned on them; following the safety we got to kick off from our own 40, rather than punt from the back of the endzone. Their tune changed to "MY GOD, IS SHULA BRILLIANT OR WHAT?!?!??" They were stunned. Pittsburgh had the long field to deal with and time ran out on them. The first time I'd seen an intentional safety.