Sometimes, it's best to leave certain jobs to the professionals -- like when you're putting on a live, unedited three-hour roast of a major celebrity . Or, at the vert least, make sure you've put the time in to prepare. Recently, comedian Nikki Glaser -- one of the standout comics at Netflix's The Greatest Roast of All Time: Tom Brady -- opened up about the event, and called out Ben Affleck for his surprise appearance, which she said bombed hard.

The roast was a star-studded comedy showcase of jabs and comedic insults leveled by a variety of celebs, and not all of them were professional comics. For example, Kim Kardashian was one of the first performers of the night, and despite getting booed hard, she managed to pull off a decent set . The same could not be said for Affleck, according to Glaser while speaking with the Barstool Sports podcast KFC Radio .

"I haven't watched it again, like how it looked, because I don't like to watch people bomb, it's not something that I [enjoy]," Glaser said. "He didn't prepare. He's someone who's famous enough he probably thinks it's beneath him to do this.

Like, 'I'm just gonna do a favor, it's not gonna be that big of a deal.'" "And then you do it and you go, 'Oh! This is way bigger than I thought it was going to be. I'm just kind of phoning it in,'" Glaser explained.

"He probably had a pitch to the writers, probably of like, 'Maybe I do an angle where I'm mad about tweets?' Because that's his [thing]." Ultimately, Glaser suggested the rea.