"I felt like I was in a movie," she said of her amateur mixed martial arts debut against Hayden Munoz. "I never had a whole room of people cheering for me. ... I was used to getting booed.
"After fighting in two Olympics, it shouldn't really compare."
Following an Olympic stint in 2008, Rousey got a job bartending because she knew it wasn't worth another four years of training just for one day of happiness.
"I didn't think it was worth being miserable for four years so I could possibly be happy for one day," Rousey said of a potential third trip to the Olympics. "The misery wasn't worth what I would get out of it."
Rousey was hooked on MMA immediately after stopping Munoz.
"I felt like I was just in love with everybody in the room," said Rousey, the first and current UFC women's bantamweight champion. "After that I was so optimistic. I was like, 'I'm going to take this whole world by storm. I'm gonna get all these girls.'"
Rousey, 26, is an undefeated 7-0 as a pro, and her next scheduled fight is a rematch against Miesha Tate on Dec. 28 at UFC 168 in Las Vegas.
She stars opposite Tate in "The Ultimate Fighter 18," which debuts Sept. 4 on Fox Sports 1.
Rousey has been a part of some of the most one-sided fights the WMMA world has ever seen. In her honor, here's a look back at the top 10 most one-sided beatdowns in WMMA history.