Tit for tat.
Franco's dealing with a lot of highs and lows lately. His art sucks, his parents suck, and thoughts of losing Carly really suck. To get things on an even keel he may have to resort to drastic measures. Next week, Franco threatens someone's life. There's a lot of that going around in Port Charles.
Vote in Soaps.com's "General Hospital" poll to let us know who Franco takes issue with enough to threaten them. Speculate in the comments section but please don't disclose the answer from the spoilers.