It was Ronda Rousey’s Buster Douglas moment. Those who watched it were stunned. Those who read about it the next morning did a double take. And more than a few people were wondering where it leaves her career.

In 1990, Mike Tyson was also unbeaten and had the same aura of invincibility as Rousey. Like her, he put opponents away rapidly and with ease. But on Feb. 10 in Tokyo, he faced the little-known Douglas as a 40-1 favorite and was knocked out in one of sports’ biggest upsets.

Rousey’s fight also took place on the other side of the world, on Sunday in Melbourne, Australia, and the result was also shocking. Holly Holm, ranked just eighth in their weight class and underwhelming in her two previous Ultimate Fighting Championship bouts, knocked Rousey out in the second round.

Rousey started the fight on the attack, perhaps looking for another quick win. But she found herself chasing Holm around the Octagon, all the time taking hard punches and kicks. She struggled to get Holm on the ground, thanks in part to Holm’s superior reach. Even when Rousey began to apply her signature armbar, Holm eluded it and continued the barrage. A nasty kick to the head finished Rousey off.