Season 2, Episode 4 - S2.E4

The Fight Part 1.

Fred and Ness have always been ""boys"" but when it comes down to who is the leader, they have a problem with eachother. Everyone thinks Ness should be the leader, even Fred says this, but then later on it seems like Fred doesn't like the idea of him being leader and while in the studio they get into a word fight which leads to Ness grabbing Fred's throat. They don't speak for a couple days.