[more like what started the whole thing]
Dan gets worried that (because he screwed up), Phil will exit his life forever. This causing Dan to explode into worry one random night, not listening to Phil's words as he ranted on and on. Phil (who loves Dan far too much to ever let him go), tries to calm him down, but grows irritated. This shows in his voice, and causes Dan to grow more desperate and scared. Phil interrupts Dan during his questioning, finishing off his question with an answer. Dan is scared that he's going to say something bad, so Phil pulls Dan into a hug, assuring him that he will never leave.