In the clip, Kimmel says he "can't even open the mail because of all of the envelopes," and also wakes up from nightmares of the awkward moment.
"I tried to get past it though, you know, and put it behind me, but it just catches up to me," he says. "I feel like I'm losing my mind. But the worst part is, they want me to do it again. So, what do I do?"
"I don't care what you do, just get out of my house," he cracks.
The Oscars airs on Sunday, March 4, at 8 p.m. on ABC.
Last March, Kimmel talked about the Oscars fiasco, and said Beatty purposely held on to the two envelopes he was given backstage to announce the "Best "Picture" winner to prove he wasn't at fault.
"He did a very smart thing, and I was impressed by this. He kept those envelopes," Kimmel revealed on The Bill Simmons Podcast. "He would not hand them to anybody. He showed them to people, but he would not hand them over. The two envelopes -- he kept both of them. Because that's the evidence, that’s the smoking gun there. As soon as you give those envelopes up, who knows who switches what out, and who knows what happened."