Bob Ross Breakdown

like James Marriott says: "Bob Ross Breakdowns occur when a creator is going through such distress that they completely shift away from their norm."

can be abbreviated to BRB, but not to be confused by the short form of be right back

Boy: "did you hear that? James Charles dyed his hair platinum blonde, I wonder why he did that..."
Girl: "it's most definitely because of a Bob Ross Breakdown"