Meeting Callie's parents
Even when the scene's just starting I feel for Hunter, who is warning Michael not to swear, fart, make stupid jokes, or do Betty Davis impressions, lol. He's your dad, Hunter, it's his job to embarrass you!
Then it gets so much worse than any of that. Callie's parents went through her journal and found out that she and Hunter had sex, and that Hunter's HIV+. They are pissed, and Hunter is even more so. They forbid Hunter from seeing Callie anymore and want to know how he got it. :(