Which Super Bowl featured the largest comeback in Super Bowl history, from a 28-3 deficit?

Which team completed the only perfect season in NFL history, including the Super Bowl, in 1972? Which team went 16-0 in the 2007 regular season but lost the Super Bowl? Which team went 0-16 in the 2008 season, the first team to do so? Which team went 0-16 in the 2017 season? Which Super Bowl was the first to go to overtime? Which Super Bowl featured a power outage that delayed play for about 34 minutes? In Super Bowl XLII, which receiver made the famous "Helmet Catch"? In Super Bowl LII, what was the name of the trick play in which Nick Foles caught a touchdown pass?