It’s not good to forget the words to Kendrick Lamar’s songs, especially when he calls you on stage to perform them with him. This past weekend at the Sweetlife music festival, Kendrick Lamar kicked a fan off stage after he realized he didn’t know the words to his popular song “m.A.A.d city.” After kicking the fan off stage, Kendrick invited another young lady fan on stage who actually knew every word. Watch footage from the festival here.