Good thread, let's see what I can recall:
1972, Browns vs Steelers. Browns go up 20-3 but the Steelers take the lead late. Cockroft kicks a GW FG in the last seconds, Browns 26-24
1974 Cleveland Crusaders vs Alberta Oilers Jim Wiste scored a hat trick in the 1st period, Crusaders won 11-2
1975 Browns vs Bengals. Browns were 0-9, Cincy 8-1. Browns score 20 straight points in the 4th Q to win 35-23
1979 Cowboys at Browns MNF. Browns came out on fire, scoring 20 points in the 1st 10 minutes and cruise to a 26-7 win (Browns were 4-0 in 1979 then the wheels came off)
1984 Cavs vs Celtics playoff game. The Cavs were lead by World B. Free and the Coliseum was rocking. The Cavs won (lost the series 3-1) but it was a good story, as the Cavs started the season 2-19 but rallied to make the playoffs.
1986 Browns 37 Steelers 31 in OT; contrary to popular belief, yes I was at the 1986 Double OT game vs the NY Jets. It was actually a horrible football game as the Browns were flat as a pancake, but Mark Gastineau bailed the Browns out with a stupid late-hit on Kosar. What a rally at the end to send it to OT
2001 (I think)- the Tribe was down 14-2 in the 7th inning and came back to beat the Seattle Mariners
2018 Browns vs NY Jets. Baker Mayfield breaks the losing streak and the Bud Light fridge got unlocked. First time I saw a home win in 3 seasons (I split seats with my cousin)