So, I've seen them all.
Riggo's run, because of when/how it occurred in the game, combined with the fact that it sealed the deal on our 1st SB win, might be the biggest play in our history, with pardons to Slingin' Sammy and our 1st two World Championships, but it doesn't have to be everybody's favorite SB play. As Om already mentioned Theisman's play earlier in the game, which without, might have kept Riggo's moment from even happening.
I have said in the past, that for me, our 1st victory over the cowboys in the 72 NFC Championship, was better than 82. We dominated their asses from start to finish. And, it was the 1st.
With that in mind, I'll go against the flow, and select Mike Bass' blocked field goal return for a TD. Which, I believe, is still the only one in Super Bowl History.
[media]http://www.youtube.com/watch?v=ZmecJufk8lc[/media]