There’s a great conversation going on at Reddit’s sports page: Which iconic plays in the history of sports would have been overturned if instant replay rules were in effect as they are today?

Here’s what users came up with:

1. The Immaculate Reception

I don’t completely agree this is a slam dunk in terms of being overturned. A recap: The play from the 1972 playoffs is a controversial one because NFL rules at the time stated two offensive players couldn’t touch the ball on one play. Did the ball touch John Fuqua first before it fell into Franco Harris’s hands? Or did the Pittsburgh Steelers back grab it off a deflection from the Raiders’ Jack Tatum? I say the replay wouldn’t have provided enough evidence.

2. The Don Denkinger World Series call

In Game 6 of the 1985 World Series, first base ump Denkinger called the Royals’ Jorge Orta safe on a close play in the ninth inning. The Cardinals protested unsuccessfully and ended up losing the contest just a few plays later. The next night, Kansas City claimed victory in Game 7. This would have definitely been overturned, a Butterfly Effect moment for sure.

3. Jeffrey Maier

We’ve been here before, but instant replay would have absolutely taken away Derek Jeter’s ALCS Game 1 home run because Maier stuck his glove into the field of play to grab the ball.

4. The “Imperfect Perfect Game”

Poor Detroit Tigers hurler Armando Galarraga had a perfect game going with two outs in the ninth inning back in 2010. But a slow roller led to a close play at first and the runner was called safe. Replay would have been a wonderful thing: Galarraga would have his perfect game, and umpire Jim Joyce wouldn’t have to deal with the suffering that came with his botched call.

5. Brett Hull’s Stanley Cup-winning goal

In 1999, Game 6 of the Stanley Cup Finals ended when Brett Hull won it for the Dallas Stars. But … his skate was illegally in the crease before he knocked the puck past Buffalo Sabres’ netminder Domink Hasek. While there are claims the NHL actually sent memos stating there could be a skate in the crease if a player had control of the puck, Sabres fans called it “No Goal.” Would replay have overturned it? It’s pretty possible.