I live by 'what if', but there are other combinations not so dear.
Three word phrases we never want to hear:
"Honey, I'm home."
"Release the hounds!"
Two word phrases that we do not want to hear:
"Seize him!"
"I forgot"
"I'm sorry"
"Don't move."
One word we don't want to hear:
"FIRE!"
"Freeze!"
"Duck" (Rhymes with another word)
"AHHHH!"