The 44-year-old actor thinks it is funny if he runs away from his teenage fans, reported Contactmusic.
"Bradley (Cooper) and the guys love it and all have good attitudes - they're professionals. But I'm just tongue-in-cheek. I think it's funny to run from teenagers and not be nice to them," Galifianakis said.
"Even if I'm playing a part, they'll have a good story to tell their friends," he added.
The actor also finds red carpet events entertaining.
"It's never like, 'Oh, this is nice!' I find myself laughing so hard and thinking, 'Don't all these people have something better to do?,'" he added.