A day after their new movie, Fist Fight debuted its trailer online, Ice Cube joined Conan on his show to talk it up. 

When the host mentioned that Cube was co-starring with Charlie Day in the movie, the rapper turned actor was quick to clarify that he was the star of the movie and that Charlie Day was nothing more than a 'second banana'. 

Something which Day, who was in the audience took exception to. The pair didn't exactly get into fisticuffs but a brutal war of words did ensue.