Watch Ronda Rousey Challenge Jimmy Fallon to a 'Mario Kart' Rematch

"I heard that your finger almost fell off, and I was like, 'Thank God,'" UFC champ tells 'Tonight Show' host ahead of video game battle

At this point, we're reasonably sure Floyd Mayweather knows who Ronda Rousey is – after all, how can he be so sure he makes more money than her? But just in case the recently retired boxing champ ever forgets, Ronda has a plan to refresh his memory, as she explained to Jimmy Fallon during a Tuesday night appearance on The Tonight Show.

"I haven't got any like texts or calls [from him], nothing like that," she said. "I mean, he still maintains that he has no clue who I am, so every time I run into him I'm gonna reintroduce myself. Maybe one day he'll actually remember me."

Rousey stopped by to promote her upcoming fight with Holly Holm at UFC 193, and perhaps even reveal a kinder, gentler side. Because while her recent bouts have been heavy on the trash talk, the lead-up to this one has been remarkably different. When Fallon asked Rousey about Holm, she was effusive with the compliments, talking up Holm's boxing credentials and calling her "an amazing athlete," and even went so far as to call her opponent "a nice chick," before adding, "a nice chick who's going to lose."

Of course, all the pleasantries went out the window when Fallon brought up his recent rout of Rousey at Mario Kart 8.

"I mopped the floor with you," he joked.

"I never played that version ever before! When I left I was so upset I went and bought a Wii, I was like 'I'm going to Mario Kart camp! I'm going to be ready,'" Rousey said. "And then I heard that your finger almost fell off, and I was like, 'Thank God.' You're going to be out of practice, and I'm going to be training, but when you heal up – it's on!"