"I'm sorry to burst your bubble, but ... "

"I'm sorry to inform you that ... "

"I hate to be the one to tell you that [something]"

Basically anything that would worm itself out of the mouth of an obnoxious besserwisser named Hector who happened to be born at home in the bathtub of an obnoxious named Helen who only digests spinach-based ecological protein bread and makes wholewheat cupcakes for events of any kind. National Organ Donor Day? Helen brought cupcakes. What a bitch.