It was far from a great play but it was "miraculous" and came in a time period that the Steelers were all-powerful and rarely beaten.

Actually spaw, the Immaculate Reception was before the Steelers were all powerful and rarely beaten. It happened in play-off game against the Raiders in 1972 which was only the second post season game in franchise history. The Steelers won 13-7 but lost to the unbeaten Dolphins 21-17 in the AFC title game the next week. They became all powerful and rarely beaten soon after this.

At the start of the '72 season I was in seventh grade and my best bud at the time was a Browns fan so I latched onto the Steelers to be contrary. Great timing for me because they won four Super Bowls in the next few years and I got to ride along vicariously. I was heavily into the NFL through the 70's but haven't much cared since.