Be careful the cat!

"Don't say 'cat' if he's not in the sack."

"Be careful the cat! No say the cat is in the sack when you have not the cat in the sack!"

"The cat is in the sack, but the sack is not closed. The cat is in it, but [the sack] is open ... and it's a wild cat!"

-- Giovanni Trappatoni (Italian football coach)

Reference: Wall Street Journal.