Did the Detroit Lions choke or was it The Curse of Bobby Layne.
While similar to the curse of Rocky Colavito that that was made in 1958 the Layne Curse continues for now 66 years.
According to Bobby's wife, after getting traded to the Steelers, Layne said "the Lions wouldn’t win a championship for another 50 years". The curse was made before the Super Bowl and when the NFL had 12 teams with six each in Eastern and Western Conferences. Had the LIons beaten the 49ers, a case could be made winning the NFC Conference lifted the curse, but apparently "the curse" took over in the second half and is still alive and well.
According to Cleveland Indians lore, after being fired as manager in 1958, Bobby Bragan walked out to the pitcher's mound at Cleveland Municipal Stadium and placed a curse on the Indians, saying "they would never win another pennant". Two years later, Colavito was traded. The last time the Cleveland Indians won the World Series was in 1948 and because they are now the Cleveland Guardians, apparently the curse will last forever.